Solve. Check for extraneous solutions.
= 7
A. {53}
B. {49}
C. {121}
D. {45}
Answer: D
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Evaluate the improper integral or state that it is divergent.
A. Divergent B. 0.434 C. 1.569 D. -1.569
Determine whether the pair of fractions is equivalent.
and 
A. equivalent B. not equivalent
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 7
B. 21
C. 
D. 3x + 17
Solve the problem.A baseball pitcher throws a baseball with an initial speed of 128 feet per second at an angle of 20° to the horizontal. The ball leaves the pitcher's hand at a height of 4 feet. Find parametric equations that describe the motion of the ball as a function of time. How long is the ball in the air? When is the ball at its maximum height? What is the maximum height of the ball?
A. x = 120.28t, y = -16t2 + 43.78t + 4 5.65 sec, 1.368 sec, 29.948 feet B. x = 120.28t, y = -16t2 + 43.78t + 4 2.642 sec, 1.368 sec, 3.984 feet C. x = 120.28t, y = -16t2 + 43.78t + 4 5.283 sec, 1.368 sec, 243.586 feet D. x = 120.28t, y = -16t2 + 43.78t + 4 2.825 sec, 1.368 sec, 33.948 feet