Multiply.(2s - 7t)(2s + 7t)
A. 4s2 - 28st - 49t2
B. 4s2 + 28st - 49t2
C. 4s2 - 49t2
D. 4s2 + 49t2
Answer: C
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Rationalize the denominator. Assume variables represent non-negative values.
A. 
B. 13
C. 
D. 4
Fill in the blank.
angle measures between 0° and 90°.
A. An acute B. A right C. An obtuse D. A straight
Solve.While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass of the passenger and the square of the speed of the car. If the a passenger experiences a force of 90 newtons when the car is moving at a speed of 50 kilometers per hour and the passenger has a mass of 40 kilograms, find the force a passenger experiences when the car is moving at 30 kilometers per hour and the passenger has a mass of 90 kilograms.
A. 90 newtons B. 64.8 newtons C. 81 newtons D. 72.9 newtons
Divide.
A. 39 R 5 B. 39 R 13 C. 38 R 15 D. 38