Select the false statement below regarding PbI2 (Ksp = 7.9 x 10−9) and PbCO3 (Ksp = 7.4 x 10−14).

A. PbCO3 is more soluble in 1.0 M  Pb(NO3)2 than in pure water

B. PbCO3 is more soluble in 1.0 M HCl than in pure water

C. the molar solubility of PbI2 can be calculated by taking the cube root of (Ksp/4)

D. PbI2 is more soluble in 1.0 M NaOH than in pure water (Kf of Pb(OH)3− = 8 x 1013)

E. PbI2 is less soluble in 1.0 M NaI than in pure water

A and D are wrong

A class I two lane highway is on level terrain with passing permitted
throughout. The highway has 11 ft lanes with 4 ft shoulders. There are 16 access points
per mile. The base FFS is 60 mi/h. The highway is oriented north and south, and
during the peak hour, 440 vehicles are going northbound and 360 vehicles are going
southbound. If the PHF is 0.87 and there are 4% large trucks, 3% buses, and 1%
recreational vehicles, what is the level of service.
Given:
ATS: PTSF:
ET= 1.2 ET= 1.1
ER= 1.0 fG=1.0 ER= 1.0 fG=1.0`
when it is level terrain, 600<vp<1200

ABC Hotel is a 390-room economy hotel in downtown St. Louis. After taking physical inventory of the laundry chemicals on May 31^st, the assistant controller found that:

In the Main Storeroom

• 15 cases of detergent at $90 each
• 15 cases of neutralizer at $65 each
• 16 cases of softener at $31 each
• 7 pails of bleach at $7.50 each
• 1 bucket of starch at $13.50 each

In the Laundry Room

• 5.75 cases of detergent
• 2.25 cases of neutralizer
• 8.50 cases of softener
• 0.50 pails of bleach
• 0.25 buckets of starch

The beginning inventory for laundry supplies on May 1^st was $6,051.75. Purchase of laundry chemicals on May 9^th totaled $890.15. The hotel sold 9,067 rooms for the month at an average daily rate of $65.10. Please calculate the laundry chemical cost percentage for the month. Please round all answers to two decimal places.

First please calculate total ending inventory $___

2. Please use the information in Question 1 to calculate the cost of laundry supplies used. Round all answers to two decimal places.

Cost of laundry supplies used $___

3.Please use the information in Question 1 to calculate the monthly rooms revenue. Round all answers to two decimal places.

Monthly rooms revenue $___

4. Please use the information in Question 1 to calculate the laundry cost percentage. Round all answers to two decimal places.

Laundry cost percentage ___%

5. Calculate the net food cost percentage for the Food department of a hotel for the month of May. The total food sales revenue for May was $191,118. The following information has been gathered:

• beginning inventory on May 1st was $6,932
• purchases in May totaled $12,883
• food transferred from main storeroom was $61,315
• food transferred to other outlet was $114
• entertainment and promotion checks totaled $2,010
• management signed checks were $691
• documented food spoilage was $139
• food for employee meals was $5,795
• happy hour hors d’oeuvres was $2,040
• ending inventory on May 31st was $6,318

To earn full credit, please calculate these amounts. Except as indicated below, answers are whole numbers. Be sure to include a minus sign (-) for any negative amounts:

First calculate gross cost of food sales $___

Please use Visual Basic

Hotel Occupancy

The Hotel has 8 Floors and 30 rooms on each floor. Create an application that calculates the occupancy rate for each floor, and the overall occupancy rate for the hotel. The occupancy rate is the percentage of rooms occupied, and may be calculated by dividing the number of rooms occupied by the number of rooms.

For example, if 18 rooms on the 1^st floor are occupied, the Occupancy Rate is as follows:

18/30=0.6 or 60%

For the Overall Occupancy Rate, using the above example,

18/(8*30)=0.075 or 7.5%

Another example for Overall Occupancy Rate:

If 1^st floor, 18 rooms occupied.

2^nd floor, 30 rooms occupied, then the calculation is:

(18+30) /(8*30)   or (18+30)/240 =0.2 or 20%

You will need to use Name Constants for Rooms (30 rooms), and Floors (8 floors).

Some variables and Constants you will need to declare in class level to do the Overall Total and Overall Occupancy Rate calculation.

Some variables you will need to use in the local level.

The application’s form should appear similar to the one shown below.

In the form load event handler, use a loop to populate floor 1 to 8 in combo box. (Do NOT create floor 1 to 8 at design time using the Items property)

On startup, “Select the floor” combo box should default to floor 1. Each time the user enters the occupancy for a single floor and clicks the Save button, the floor number in the Drop-Down List ComboBox should increment automatically (just add 1 to its SelectedIndex property), and a new line should appear in the ListBox with the percentage occupancy. Also, the contents of the TextBox at the top of the form should clear automatically when the user clicks the Save button, so the user does not accidentally enter the same data twice in a row.

The Restart button should clear all the appropriate controls on the form. “Select the floor” combo box should default to floor 1.

The Exit button should end the application.

The Save button should do all input validation and all other calculations. (Do NOT use a loop in the btnSave_click event handler)

Input Validation: Be sure to check for a non-integer value in TextBox using the Integer.TryParse method and notify the user if there is an error. Since each floor has only 30 rooms, you need to do the range check to prevent user enter a value is greater than 30 or a negative number. A zero is allowed to input since it may have no occupancy for the whole floor.

Use the values below to confirm that your application is performing the correct calculations.

Use access key for all buttons’ control.   

Georges Hotel has the following sales procedures: The hotel uses duplicated and pre-numbered guest checks to record customers’ orders; the manager is in charge of monitoring the guest checks. She stores them in a storage container which is kept locked until she is ready to issue them to the servers. At the beginning of each shift, the manager issues the guest checks to the servers and records the amount given to each person on a blank sheet of paper. The server takes the order from the customers and records the information on the guest checks. She then presents the kitchen with one copy of the guest check for them to prepare the order and she keeps the other copy to be handed in at the end of the shift. The server informs the cashier of the order by word of mouth. In the event that there were any errors during the shift, servers are allowed to destroy the guest checks.

1. Identify three problems in the sales procedure of the Hotel, explain how they could be detrimental and suggest a control procedure that could be used to address each problem

2. Name three key personnel normally involved in a Hotel’s front office accounting functions. Of the three, chose one and briefly describe their role.

Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle θ = 35o to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall and lands in the bleachers. After you congratulate Ted on his hit, he tells you: “You think that was something! If there was no air resistance I could have hit that ball clear out of the stadium!” Since you are now taking PH131, you can easily verify Ted’s claim. Assume that the outer wall of the stadium is 100 feet high and 565 feet away from the home plate. Note: 1 mile = 1609 m, 1 foot = 0.3 m Figure 7:

(a) What are the horizontal and vertical components of the ball’s initial velocity? (b) How long does it take for the ball to fly the horizontal distance to the wall? (c) How high above the ground is the ball at that time? Is Ted Williams right? (d) What is the maximum hight above the ground which the ball reaches during its flight? (e) What is the horizontal distance the ball travels before hitting the ground? Bonus: What are the ball’s velocity components at the moment it hits the ground?

A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately

mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers.

(a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use μ_males − μ_females. Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.)

(b) Do these data provide convincing support for the claim that, on average, male teenage drivers exceed the speed limit by more than do female teenage drivers?

YesNo     

Suppose you need to prepare 1.0 L of Stock solution which must have a concentration of 150 mg N/L. You start with solid Potassium Nitrate, KNO₃ .

A. How many moles of Nitrogen should 1.0 L of Stock solution contain?

B. How many moles of KNO₃ should 1.0 L of stock solution contain?

C. How many grams of KNO₃ will you have to weigh out to prepare 1.0 L of stock solution? (Show ALL work!) (Reminder: the concentration of stock must be known to 3 significant figures!)

2. Another Stock solution you may have to prepare must contain 80.0 mg Phosphorus /L. Using steps similar to those used for Nitrogen Stock solution in Question 1, find how many grams of Potassuim Dihydrogen Phosphate (KH₂PO₄ ) you will need to weigh out to prepare 1.0 L of such Stock solution

A tire manufacturer believes that the life of its tires follow a normal distribution with a mean of 46,000 miles and a standard deviation of 4,000 miles. What mileage can he guarantee each tire to last so that 99% of the tires last longer than the guaranteed lifetime?