A GC needs to fill and compact a trench that has the following dimensions 150 x 50 x 1.5 ft.   The sub is going to use a dump truck that can carry 12 CY, and travels at an average speed of 40 mph. The borrow pit is located 45 miles from the construction site. The truck driver makes $50/hr and works 8 hours per day. Loading time for the truck is 30 minutes and unloading time is 5 minutes. The sub has to rent the truck at $500 per day + a driver @ $50/hour. The cost of soil $20 per BCY. The soil has a swell factor of 18% and a compaction factor of 12%.

How much will the driver cost?

A hazardous material spill on Interstate I-76 caused the eastbound traffic 20-minute delay. Traffic flow is completely shut down on a three-lane section creating a jam density of 160vpm/lane. If the arriving flow on this roadway section is 3300vph at a density of 35 vpm/lane, determine the following:

a) the total number of vehicles in the queue and the queue length (miles) after 20 minutes.

b) spacing (in ft/Veh) between vehicles in the jammed traffic.

c) if the roadway is re-opened after 20 minutes and the releasing flow at the bottleneck is 1800vph/lane at a density of 60vpm/lane, how long will it take for the releasing wave (moving upstream from the bottleneck) to catch up with the jam density shockwave?

The following table shows the average distance, to the nearest mile, travelled per week to work by a random sample of 350 commuters.

Miles Travelled Frequency Midpoint Class Boundaries

6 - 11 43

12 - 17 32

18 – 23 80

24 - 29 120

30 - 35 75

(a) Complete the table above.

(b) What is the mean distance travelled per week by these commuters?

(c) Why is the answer for part (b) an estimate of the mean distance travelled?

(d) State one advantage and one disadvantage of using the mean as a measure of central tendency.

(e)What is the modal length of distance travelled by the commuters?

(f) Calculate the variance for the distance travelled per week by the commuters.

1. In general, the marginal cost curve is U-shaped as you learned in lectures and the textbook. However, exception exists. Please provide one particular industry as an example to illustrate that MC is not U-shaped. Explain briefly the shape of MC in the industry. 2. Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of gasoline. They estimated that in mass production the car would cost $40,000 per unit to build. The engineers argued that Congress should force U.S. automakers to build this energy-efficient car. In your opinion, is energy efficiency the same thing as economic efficiency? Please explain your opinion and state whether you support it or not.

A random sample of six cars from a particular model year had the fuel consumption figures, measure in miles per gallon, shown below.

1. Using T.INV, find a 90% confidence interval for the population mean of fuel consumption for cars of this model year. Assume the distribution is normal.   (Round to 2 digits, since our raw data below are expressed with one digit.) (Show work in space provided.)

(ii) Calculate the same interval using CONFIDENCE.T. (Show work in space provided.)

(iii) Calculate the same interval using T.INV.2T.

(Note: when calculating the lower and upper bounds of the interval, do not use a rounded mean that you’ve calculated with AVERAGE. Use the unrounded mean.   Round only the final answers, which are the lower and upper bounds of the interval. Also, make sure to use STDEV.S to calculate the sample standard deviation.)

              Data:

              28.6

              18.4

              19.2

              25.8

              19.4

              20.5

A couple was at a ski lodge and went to happy hour from 5pm to 9pm. The bar stops serving at 10pm. They leave the ski resort on a snowy night and are driving back to the hotel which is about an hour’s drive from the resort. At 12 am a passerby sees a car off the road in the trees. He finds the male unconscious and injured behind the wheel. The female is deceased. The passerby calls 911 and it takes an hour for them to come. The male arrives at the hospital at 2 am and his blood is drawn at 2:30 am. The male is found to have a BAC of 100mg/dl in plasma.

Male weighs 70 kg

Calculate if he is going to jail or not and why?

How many drinks did he consume?

Minimum # of drinks to achieve BAC?

Clue: the key thing to realize is the happy hour ended at 9 pm and the bar closed at 10 pm. therefore, what assumptions can be made about whether he was absorptive or post-absorptive?

1) A 7% Commonwealth government bond has three years to maturity. Given that the bond pays coupons semi-annually (i.e. twice a year) and a coupon payment has just been made, what is the present value (price) of the bond if the market interest rate is 9% and the face value of the bond is $100,000?

2) You have observed the returns for an investment in Telstra shares for the last five years. This shows returns of 23%, -17%, 8%, 22% and 3%. Calculate the average return, variance, and standard deviation of these shares.

3) You own a portfolio that is invested as follows: $11,600 in shares of Rendezvous hotel, $7,800 in shares of Crown Plaza, $14,900 in shares of Carlton & United Breweries, and $3,200 in shares of Domino’s Pizza . What is the portfolio weight of shares of Carlton & United Breweries?

4) One year ago, you bought a share for $36.48. You received a dividend of $1.62 per share last month and sold the share today for $40.18. What is the capital gains yield on this investment?

Each statement describes one of the major market models or industry structures (pure competition, pure monopoly, oligopoly, or monopolistic competition) . Provide the market model or industry structure each description best fits

1. Individual firm in this market model faces a perfectly elastic demand curve.

2. Industry model where excess capacity is most likely to be found.

3. Industry structure in which one firm produces a product for which there are no good substitutes.

4. The Vegas hotel casino industry would be found in the industry or market model.

5. A pharmaceutical company would be classified in this group:

6. Market structure in which a local pizza or sandwich shop would be classified.

7. The beer industry would be classified in this industry structure.

8. The airline industry is found in this industry or market structure.

9. Industry structure in which both productive and allocative efficiency is attained in the the long run.

10.  Market structure marked by mutual interdependence among firms.

1.Jared and Laura have renter’s insurance with a $500 deductible and a $20,000 coverage limit. Unfortunately, a fire destroys their apartment, requiring them to stay in a hotel for $100 a night for 10 nights. In addition, they lost $7,000 worth of property. How much will their renter’s insurance pay?

A.$7,500.

B.$7,000.

C.$6,500.

D.$8,000.

2. Jason, age 49, recently used $10,000 from his IRA to purchase his first home. Which of the following applies?

A.Jason will have to pay taxes and a penalty for taking a distribution from his account before age 59½.

B.Jason will not have to pay taxes nor a penalty since he is withdrawing money from his own IRA.

C.Jason will incur a 10% penalty for taking a distribution before age 50½, but he will not have to pay income taxes since he is a first-time homebuyer.

D.Jason will have to pay taxes on his distribution, but he will not incur an additional 10% penalty since he is a first-time homebuyer.