Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 9 miles per hour and the other at 5 miles per hour. In how many hours will they be 70 miles apart?
A. 10 hours
B. 20 hours
C. 14 hours
D. 5 hours
Answer: D
Mathematics
You might also like to view...
Use the vectors u, v, w, and z head to tail as needed to sketch the indicated vector. 
u + z 
A. 
B. 
C. 
D. 
Mathematics
Set up an integral for the length of the curve.y = 4 cos x, 0 ? x ? ?
A. 
B. 
C. 
D. 
Mathematics
Evaluate the derivative at the given value of x.y = 6 - 4x2; x = -1
A. -8 B. 14 C. -2 D. 8
Mathematics
Add.-3 + (-10) + (-24) + (-7)
A. -18 B. -44 C. 10 D. -38
Mathematics