1: State how many significant figures there are in each of the following calculations, and indicate which is the limiting value:
Part (a) (18.7)2:
1- 1 (limited by 2)
2-4 (limited by 18.7
3- 2 (limited by 18.7
4- 3 (limited by 18.7)
5- None of these.
Part (b) (1.60 × 10-19)(3712) :
1- 2 (limited by 3712)
2- 2 (limited by 1.60)
3- 4 (limited by 3712)
4- 3 (limited by 1.60)
5- None of these.
2: A student witnesses a flash of lightning and then t = 2.5 s later the student hears the associated clap of thunder.
Part (a) Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters?
Part (b) Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the lightning strike?
3: On a two-leg trip, a car travels the first leg, a distance D1 = 49 miles, in a time t1 = 1.1 hours, and travels the second leg, a distance D2 = 140 miles, in time t2 = 2.25 hours. Refer to the figure.
Part (d) What is the average speed for the whole trip in meters per second?
4: A student begins at rest and then walks north at a speed of v1 = 0.55 m/s. The student then turns south and walks at a speed of v2 = 0.92 m/s. Take north to be the positive direction. Refer to the figure.
Part (a) What is the student's overall average velocity vavg, in meters per second, for the trip assuming the student spent equal times at speeds v1 and v2?
Part (b) If the student travels in the stated directions for 30.0 seconds at speed v1 and for 20.0 seconds at speed v2, what is the net displacement, in meters, during the trip?
Part (c) If it takes the student 5.0 s to reach the speed v1 from rest, what is the magnitude of the student’s average acceleration, in meters per second squared, during that time?
In: Physics
1. Convert the following code shown below to C++ code:
| public class HighwayBillboard { |
| public int maxRevenue(int[] billboard, int[] revenue, int distance, int milesRes) { |
| int[] MR = new int[distance + 1]; |
| //Next billboard which can be used will start from index 0 in billboard[] |
| int nextBillBoard = 0; |
| //example if milesRes = 5 miles then any 2 bill boards has to be more than |
| //5 miles away so actually we can put at 6th mile so we can add one mile milesRes |
| milesRes = milesRes + 1; // actual minimum distance can be between 2 billboards |
| MR[0] = 0; |
| for (int i = 1; i <= distance; i++) { |
| //check if all the billboards are not already placed |
| if(nextBillBoard < billboard.length){ |
| //check if we have billboard for that particular mile |
| //if not then copy the optimal solution from i-1th mile |
| if (billboard[nextBillBoard] != i) { |
| //we do not have billboard for this particular mile |
| MR[i] = MR[i - 1]; |
| } else { |
| //we do have billboard for this particular mile |
| //now we have 2 options, either place the billboard or ignore it |
| //we will choose the optimal solution |
| if(i>=milesRes){ |
| MR[i] = Math.max(MR[i - milesRes] + revenue[nextBillBoard], MR[i - 1]); |
| }else{ |
| //there are no billboard placed prior to ith mile |
| //we will just place the billboard |
| MR[i] = revenue[nextBillBoard]; |
| } |
| nextBillBoard++; |
| } |
| }else{ |
| //All the billboards are already placed |
| //for rest of the distance copy the previous optimal solution |
| MR[i] = MR[i - 1]; |
| } |
| } |
| //System.out.println(Arrays.toString(MR)); |
| return MR[distance]; |
| } |
| public static void main(String[] args) { |
| int[] x = {6, 7, 12, 13, 14}; |
| int[] revenue = {5, 6, 5, 3, 1}; |
| int distance = 20; |
| int milesRestriction = 5; |
| HighwayBillboard h = new HighwayBillboard(); |
| int result = h.maxRevenue(x, revenue, distance, milesRestriction); |
| System.out.println("Maximum revenue can be generated :" + result); |
| } |
| } |
In: Computer Science
1 (a) Assume that the lights in your kitchen use 300 watts. How much energy and how much does it cost to leave the lights on 24 hours a day for a week if electricity is 8 cents/kilowatt hour?
(b) For a month (assume 30 days/month)?
(c) For a year?
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2 (a) How much energy and how much money do you use to run your window air conditioner rated at 1500 watts continuously for the month of July (assume 8¢/kWh)?
(b) If you assume that coal was used to produce the electricity for your air conditioner, how much coal was burned to produce the electricity used?
(c) How much CO2 was produced by the electricity used to run your air conditioner?
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3 (a) An average incandescent light bulb has a life expectancy of 1,000 hours. How much energy would a typical 60 watt bulb use in a lifetime, assuming it lasts for 1,000 hours?
(b) At 8¢/kWh, how much would it cost over its lifetime?
-----------------------------------------------------------------------------------------------------------------------
4 (a) A compact fluorescent bulb uses 15 watts and has a life expectancy of 10,000 hours. How much energy and how much would it cost to use a compact fluorescent for 10,000 hours?
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5 (a) If your car gets 20 miles per gallon (MPG), and you drive an average of 10,000 miles each year, how many gallons of gas do you use a year?
(b) At $3.00 per gallon, how much will you spend on gasoline for the year?
(c) If the combustion of each gallon of gasoline produces 22 lbs of CO2, how much CO2 does your car produce each year?
(d) If you traded your car in & bought one that got 25 MPG, how much gasoline would you save in one year?
(e) How much money would you save?
(f) How much less CO2 would be emitted into the atmosphere from your improved car?
In: Physics
As part of a study designed to compare hybrid and similarly equipped conventional vehicles, Consumer Reports tested a variety of classes of hybrid and all-gas model cars and sport utility vehicles (SUVs). The following data show the miles-per-gallon rating Consumer Reports obtained for two hybrid small cars, two hybrid midsize cars, two hybrid small SUVs, and two hybrid midsize SUVs; also shown are the miles per gallon obtained for eight similarly equipped conventional models.
| Make/Model | Class | Type | MPG |
|---|---|---|---|
| Honda Civic | Small Car | Hybrid | 37 |
| Honda Civic | Small Car | Conventional | 28 |
| Toyota Prius | Small Car | Hybrid | 44 |
| Toyota Corolla | Small Car | Conventional | 32 |
| Chevrolet Malibu | Midsize Car | Hybrid | 27 |
| Chevrolet Malibu | Midsize Car | Conventional | 23 |
| Nissan Altima | Midsize Car | Hybrid | 32 |
| Nissan Altima | Midsize Car | Conventional | 25 |
| Ford Escape | Small SUV | Hybrid | 27 |
| Ford Escape | Small SUV | Conventional | 21 |
| Saturn Vue | Small SUV | Hybrid | 28 |
| Saturn Vue | Small SUV | Conventional | 22 |
| Lexus RX | Midsize SUV | Hybrid | 23 |
| Lexus RX | Midsize SUV | Conventional | 19 |
| Toyota Highlander | Midsize SUV | Hybrid | 24 |
| Toyota Highlander | Midsize SUV | Conventional | 18 |
At the α = 0.05 level of significance, test for significant effects due to class, type, and interaction.
Find the value of the test statistic for class. (Round your answer to two decimal places.)
Find the p-value for class. (Round your answer to three decimal places.)
p-value =
Find the value of the test statistic for type. (Round your answer to two decimal places.)
Find the p-value for type. (Round your answer to three decimal places.)
p-value =
Find the value of the test statistic for interaction between class and type. (Round your answer to two decimal places.)
Find the p-value for interaction between class and type. (Round your answer to three decimal places.)
p-value =
In: Statistics and Probability
117. Bates Company purchased equipment on January 1, 2008, at a total invoice cost of $600,000. The equipment has an estimated salvage value of $15,000 and an estimated useful life of 5 years. What is the amount of accumulated depreciation at December 31, 2009, if the straight-line method of depreciation is used?
a. $120,000
b. $240,000
c. $117,000
d. $234,000
118. On January 1, a machine with a useful life of five years and a residual value of $15,000 was purchased for $45,000. What is the depreciation expense for year 2 under the double-declining-balance method of depreciation?
a. $10,800
b. $18,000
c. $14,400
d. $8,640
119. A machine with a cost of $160,000 has an estimated salvage value of $10,000 and an estimated useful life of 5 years or 15,000 hours. It is to be depreciated using the units-of-activity method of depreciation. What is the amount of depreciation for the second full year, during which the machine was used 5,000 hours?
120. Equipment with a cost of $240,000 has an estimated salvage value of $15,000 and an estimated life of 4 years or 15,000 hours. It is to be depreciated using the units-of-activity method. What is the amount of depreciation for the first full year, during which the equipment was used 3,300 hours?
a. $60,000
b. $67,800
c. $49,500
d. $56,250
121. Larime Company purchased equipment for $40,000 on January 1, 2007, and will use the double-declining-balance method of depreciation. It is estimated that the equipment will have a 5-year life and a $2,000 salvage value at the end of its useful life. The amount of depreciation expense recognized in the year 2009 will be
a. $5,760.
b. $9,120.
c. $9,600.
d. $5,472.
122. Interline Trucking purchased a tractor trailer for $98,000. Interline uses the units-of-activity method for depreciating its trucks and expects to drive the truck 1,000,000 miles over its 12-year useful life. Salvage value is estimated to be $14,000. If the truck is driven 90,000 miles in its first year, how much depreciation expense should Interline record?
a. $7,000
b. $8,820
c. $7,560
d. $8,167
In: Accounting
Dollars and Cents versus a Sense of Ethics
Grizzly Community Hospital in central Wyoming provides health care services to families living within a 200-mile radius. The hospital is extremely well equipped for a relatively small, community facility. However, it does not have renal dialysis equipment for kidney patients. Those patients requiring dialysis must travel as far as 300 miles to receive care.
Several of the staff physicians have proposed that the hospital invest in a renal dialysis center. The minimum cost required for this expansion is $4.5 million. The physicians estimate that the center will generate revenue of $1.15 million per year for approximately 20 years. Incremental costs, including the salaries of professional staff and depreciation, will average $850,000 annually. Grizzly is exempt from paying any income taxes. The only difference between annual net income and net cash flows is caused by depreciation expense. The center is not expected to have any salvage value at the end of 20 years.
The administrators of the hospital strongly oppose the proposal for several reasons: (1) They do not believe that it would generate the hospital’s minimum required return of 12 percent on capital investments; (2) they do not believe that kidney patients would use the facility even if they could avoid traveling several hundred miles to receive treatment elsewhere; (3) they do not feel that the hospital has enough depth in its professional staff to operate a dialysis center; and (4) they are certain that $4.5 million could be put to better use, such as expanding the hospital’s emergency services to include air transport by helicopter.
The issue has resulted in several heated debates between the physicians and the hospital administrators. One physician has even threatened to move out of the area if the dialysis center is not built. Another physician was quoted as saying, “All the administrators are concerned about is the almighty dollar. We are a hospital, not a profit-hungry corporation. It is our ethical responsibility to serve the healthcare needs of central Wyoming’s citizens.”
Instructions
a. Financial factors and measures. (Compute Payback Period, ROI and NPV - Show all calculations for the supporting calculations. )
In: Accounting
In an article in the Journal of Marketing, Bayus
studied the differences between "early replacement buyers” and
"late replacement buyers” in making consumer durable good
replacement purchases. Early replacement buyers are consumers who
replace a product during the early part of its lifetime, while late
replacement buyers make replacement purchases late in the product’s
lifetime. In particular, Bayus studied automobile replacement
purchases. Consumers who traded in cars with ages of zero to three
years and mileages of no more than 35,000 miles were classified as
early replacement buyers. Consumers who traded in cars with ages of
seven or more years and mileages of more than 73,000 miles were
classified as late replacement buyers. Bayus compared the two
groups of buyers with respect to demographic variables such as
income, education, age, and so forth. He also compared the two
groups with respect to the amount of search activity in the
replacement purchase process. Variables compared included the
number of dealers visited, the time spent gathering information,
and the time spent visiting dealers.
(a) Suppose that a random sample of 796 early replacement buyers yields a mean number of dealers visited of x¯x¯ = 3.1, and assume that σ equals .77. Calculate a 99 percent confidence interval for the population mean number of dealers visited by early replacement buyers. (Round your answers to 3 decimal places.)
The 99 percent confidence interval is
[,
].
(b) Suppose that a random sample of 496 late
replacement buyers yields a mean number of dealers visited of x¯x¯
= 4.8, and assume that σ equals .64. Calculate a 99
percent confidence interval for the population mean number of
dealers visited by late replacement buyers. (Round your
answers to 3 decimal places.)
The 99 percent confidence interval is
[,
].
(c) Use the confidence intervals you computed
in parts a and b to compare the mean number of
dealers visited by early replacement buyers with the mean number of
dealers visited by late replacement buyers. How do the means
compare?
In: Math
In an article in the Journal of Marketing, Bayus
studied the differences between "early replacement buyers” and
"late replacement buyers” in making consumer durable good
replacement purchases. Early replacement buyers are consumers who
replace a product during the early part of its lifetime, while late
replacement buyers make replacement purchases late in the product’s
lifetime. In particular, Bayus studied automobile replacement
purchases. Consumers who traded in cars with ages of zero to three
years and mileages of no more than 35,000 miles were classified as
early replacement buyers. Consumers who traded in cars with ages of
seven or more years and mileages of more than 73,000 miles were
classified as late replacement buyers. Bayus compared the two
groups of buyers with respect to demographic variables such as
income, education, age, and so forth. He also compared the two
groups with respect to the amount of search activity in the
replacement purchase process. Variables compared included the
number of dealers visited, the time spent gathering information,
and the time spent visiting dealers.
(a) Suppose that a random sample of 803 early replacement buyers yields a mean number of dealers visited of x¯x¯ = 3.9, and assume that σ equals .75. Calculate a 99 percent confidence interval for the population mean number of dealers visited by early replacement buyers. (Round your answers to 3 decimal places.)
The 99 percent confidence interval is
[,
].
(b) Suppose that a random sample of 506 late
replacement buyers yields a mean number of dealers visited of x¯x¯
= 4.4, and assume that σ equals .69. Calculate a 99
percent confidence interval for the population mean number of
dealers visited by late replacement buyers. (Round your
answers to 3 decimal places.)
The 99 percent confidence interval is
[,
].
(c) Use the confidence intervals you computed
in parts a and b to compare the mean number of
dealers visited by early replacement buyers with the mean number of
dealers visited by late replacement buyers. How do the means
compare?
Mean number of dealers visited by late replacement buyers appears to be (Click to select)higher/lower.
In: Finance
Steven Black and Christopher Green are seeking funds to support the programmed growth of their deluxe Hot Dog menu-restricted restaurant. First year (2019) Sales were $705,000. Sales are projected to increase to $1,320,000 in 2020. The business operating financial model indicates that each hot dog “meal” will sell for $3; and the variable cost of producing the “meal” (CGS) will be $1.50. The company needed $400,000 in assets to support its 2019 operations and expects to need $100,000 MORE (a total of $ 500,000) to support projected 2020 Sales.
2019 2020 (projected)
Sales $ 705,000 _________
COGS (Meals x CGS) 352,500 __________
Gross Profit 352,500 ________
Fixed Operating Costs (ignore taxes) 200,000 __________
Net Profit $152,500 $ ______
Prepare (fill in) the 2020 projected Income Statement above.
Calculate the company’s Return on Assets (ROA), its asset intensity (asset turnover ratio), and its Gross Profit and Net Profit Ratios for each year
2019 2020
Return on Assets __________ ____________
Asset Turnover ____________ ________________
Gross Profit Margin _______________ _________________________
Net Profit Margin ______________ _____________________
Given the 2019 calculations above, and the 2020 projections, use the VOS screening model standards below for profitability and pricing to evaluate the attractiveness of an investment in Steven and Christopher’s business.
High Average Low
Gross Margin >50% 10%--50% <20%
AT margin >20% 10%--20% <10%
Asset Intensity 3.0+ Turnover 1.0—3.0 Turnover <1.0 Turnover
Return on Assets >25% 10%--25% <10%
COMMENTS/EVALUATION (You should include comments about what the company could do to make the investment more attractive to investors)
Margins:
Use of Assets:
How would your EVALUATION change if the 2019 Asset level will support Annual Sales growth of 50% per year in 2020? (That means the company had excess capacity in 2019 and more assets would not be required to support shortterm projected growth.)
PLEASE HELP ME. THANK YOU.
In: Finance
Edgerron Company is able to produce two products, G and B, with
the same machine in its factory. The following information is
available.
| Product G | Product B | ||||||||||
| Selling price per unit | $ | 132 | $ | 160 | |||||||
| Variable costs per unit | 50 | 96 | |||||||||
| Contribution margin per unit | $ | 82 | $ | 64 | |||||||
| Machine hours to produce 1 unit | 0.4 | hours | 1.0 | hours | |||||||
| Maximum unit sales per month | 600 | units | 150 | units | |||||||
The company presently operates the machine for a single eight-hour
shift for 22 working days each month. Management is thinking about
operating the machine for two shifts, which will increase its
productivity by another eight hours per day for 22 days per month.
This change would require $8,000 additional fixed costs per month.
(Round hours per unit answers to 1 decimal place. Enter
operating losses, if any, as negative values.)
Edgerron Company is able to produce two products, G and B, with
the same machine in its factory. The following information is
available.
| Product G | Product B | ||||||||||
| Selling price per unit | $ | 132 | $ | 160 | |||||||
| Variable costs per unit | 50 | 96 | |||||||||
| Contribution margin per unit | $ | 82 | $ | 64 | |||||||
| Machine hours to produce 1 unit | 0.4 | hours | 1.0 | hours | |||||||
| Maximum unit sales per month | 600 | units | 150 | units | |||||||
The company presently operates the machine for a single eight-hour
shift for 22 working days each month. Management is thinking about
operating the machine for two shifts, which will increase its
productivity by another eight hours per day for 22 days per month.
This change would require $8,000 additional fixed costs per month.
(Round hours per unit answers to 1 decimal place. Enter
operating losses, if any, as negative values.)
In: Accounting