Solve the problem.A car rental company has two rental rates. Rate 1 is $63 per day plus $.18 per mile. Rate 2 is $126 per day plus $.09 per mile. If you plan to rent for one week, how many miles would you need to drive to pay less by taking Rate 2?
A. more than 17,150 miles
B. more than 4900 miles
C. more than 9800 miles
D. more than 5000 miles
Answer: B
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Solve the problem.Write the equations that describe the simple harmonic motion of a particle moving uniformly around a circle of radius 9 units, with linear speed 4 units per second.
A. x = 9 sin 4t, y = 9 sin 4t
B.
| x = 9 cos 4t, y = 9 sin 4t |
C. x = cos 9t + 4, y = sin 9t + 4
D. x = 4 cos 9t, y = 9 sin 4t
Solve.Josh and Sam traveled in separate cars from their apartment to a ski resort 120 miles away. Sam wanted to get there early, so he traveled the maximum speed limit, 40 mph. Josh just bought a new car, so he drove a little slower at exactly 30 mph. If they both left at the same time, how much sooner did Sam arrive at the ski resort than Josh?
A. they arrive at the same time B. 3 hours sooner C. 1 hour sooner D. 2 hours sooner
Find the derivative.y = 
+ 
A. - 
+ 
B. - 
- 
C. 
+ 
D. - 
- 
Divide.
A. 215 B. 22.5 C. 21.5 D. 225