RTM Practice #1

To test the flow of coolant through a radiator with a 2 inch diameter passage, a flow of 5 gallons was recorded in 4 minutes. Find the velocity in feet per second of the flow through the radiator.

1.5 feet per second (ft/sec)

A contractor estimate that 10,032 cement blocks are needed for a job. How many additional blocks must be ordered to provide for 12% scrap and damage?

1204 additional blocks

The local hardware store sells custom-colored paint. A certain orange color needed to match the color on a piece of machinery consists of 1.5 parts red paint and 2 parts yellow paint. How many gallons of red and how many gallons of yellow paint are needed to make 28 gallons of orange paint?

16 gallons of yellow paint, 12 gallons of red paint

A millwright must use a rough wooden timber measuring 8x12 inches. If a timber that is 7 13/16 thick is required, and equal thickness are cut from each rough side, how thick are the pieces cut off each side?

3/32 inch or 0.09375 inch

Floor tiles measure 8 inches square. How many will be required to tile an office floor containing 1600 square yards?

32,400 tiles

A local pizza parlor is offering a half-price deal on any pizza with one topping. There are eight toppings from which to choose. In addition, there are three different choices for the size of the pizza, and two choices for the type of crust. In how many ways can a pizza be ordered?

48

A lever has a 140-pound weight on one end and a 160-pound weight on the other end. The lever is balanced, and the 140-pound weight is exactly one foot farther from the fulcrum than the 160-pound weight. How far from the fulcrum is the 160-pound weight?

7 feet

Suppose that the mean starting salary of welders in a specific region is $37,480 with a standard deviation of $1,400 and that salaries follow a normal distribution. Approximately what percentage of the salaries will be between $34,680 and $40,280?

95%

Let E be the event that a new car requires engine work under warranty and let T be the event that the car requires transmission work under warranty. Suppose that P(E)=0.10, P(T)=0.02, and P(E and T)=0.01. Find the probability that the car needs work on either the engine, the transmission, or both.

P(E or T)=0.11

_____ Solve for x: √x+3 -2 =6

x=61