Solve.A motorcycle traveling at 70 miles per hour overtakes a car traveling at 30 miles per hour that had a three-hour head start. How far from the starting point are the two vehicles?
A. 5
miles
B. 2
miles
C. 63 miles
D. 157
miles
Answer: D
Mathematics
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Suppose that y is inversely proportional to x. Use the given information to find the constant of proportionality k. Then use y = 
to find y for the given value of x.y = 2.5 when x = 5;
Find y given x = 16.
A. k = 5; y = 
B. k = 0.5; y = 8
C. k = 12.5; y = 
D. k = 2.5; y = 
Mathematics
Solve the problem.What percent of 50 is 18?
A. 36% B. 144% C. 18% D. 72%
Mathematics
Solve the problem.Consider a population that grows according to the recursive rule PN = 5 × PN-1, with initial population P0 = 6. Which of the following is an explicit description of this population sequence?
A. PN = 5 × 6N-1 B. PN = 5 × 6N C. PN = 6 × 5N-1 D. PN = 6 × 5N E. none of these
Mathematics
Simplify.|-63|
A. -63
B. 
C. 63
D. 0
Mathematics