Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.3x2 - 4x - 7 = 0
A. x = 
, -1
B. x = 
, 1
C. x = 
, 1
D. x =
, -1
Answer: D
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Solve the problem.A car is traveling at 34 mph. If its tires have a diameter of 25 inches, how fast are the car's tires turning? Express the answer in revolutions per minute. If necessary, round to two decimal places.
A. 2872.32 revolutions per minute B. 439.14 revolutions per minute C. 914.29 revolutions per minute D. 457.14 revolutions per minute
Factor the difference of cubes.8r3 - 27
A. (2r - 9)(4r2 - 6r + 3) B. (2r - 3)(4r2 - 9) C. (2r + 3)(4r2 - 6r + 9) D. (2r - 3)(4r2 + 6r + 9)
Solve the problem.The distance, s, in feet, traveled by a body falling freely from rest in t seconds is approximated by the function 
An experimenter on a ladder releases a marble from rest. The marble takes 5 seconds to fall to the ground. How high was the marble when it was released?
A. 6400 feet B. 25 feet C. 400 feet D. 80 feet
Use the reciprocal identities for the following problem. ? If tan ? = 5a, (a? 0) find cot ?. ?
A. 
B. 
C. 
D. 
E. 