Round to the indicated place value.Round 20.27467 to the nearest ten-thousandth.
A. 20.2746
B. 20.27
C. 20.2747
D. 20.275
Answer: C
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When a car skids to a stop, the length L, in feet, of the skid marks is related to the speed ?S, in miles per hour, when the brakes were applied. The formula is
.
?
A: If the skid marks are 224 feet long, how fast was the car going when the brakes were applied?B: If your speed doubles, how is the skid mark length affected?C: You are driving at 69 miles per hour. You wish to slow to a speed that will cut the length of potential skid marks in half (thus reducing the emergency stopping distance). What should be your new speed?
?
Round your answer to two decimal places if necessary.
?
What will be an ideal response?
Write as a percent. Round to the nearest hundredth of a percent when necessary.
A. 23.33% B. 2.33% C. 4.29% D. 42.86%
A bacterial culture grows according to the formula 
. If it takes 10 days for the culture to triple in size, how long will it take to double in size? (in days)
?
Round your answer to the nearest tenth of a day.
?
__________ days
Fill in the blank(s) with the appropriate word(s).
Solve the problem.In an analysis of traffic, a certain city estimates the traffic flow as illustrated in the figure below, where the arrows indicate the flow of traffic. If x1 represents the number of cars traveling from intersection A to intersection B, x2 represents the number of cars traveling from intersection B to intersection C, and so on, we can formulate equations based on the principle that the number of vehicles entering the intersection equals the number leaving it. Formulate an equation for the traffic at each of the four intersections. 
A. x1 - x4 = -450 x1 - x2 = -650 x2 - x3 = -1400 x3 - x4 = 1100 B. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = 1100 C. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = -1100 D. x1 - x4 = -650 x1 - x2 = -450 x2 - x3 = 1400 x3 - x4 = -1100