Find the midpoint of the segment connecting the given endpoints.(-5, 0), (1, 9)
A. (-4, 9)
B. 
C. (-6, -9)
D. 
Answer: B
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 5 cos 2t + 4 cos 6t, y = 5 sin 2t - 4 sin 6t, 0 ? t ? ?
A. 
B. 
C. 
D. 
Solve the problem.A box in the shape of a cube has a volume of 27 cubic inches. What is the depth of the box? 
A. 5 in. B. 6 in. C. 3 in. D. 9 in.
Solve graphically.2x - y = 1
A. No solution B. (3, 2) C. Infinitely many solutions D. (2, 3)
Solve the problem.As a radioactive sample disintegrates, the "parent" atoms are converted into "daughter" atoms. The number of daughter atoms D(t) that have been formed by a particular time t is given by 
where D(t) is the number of daughters, Po is the initial number of parent atoms, k is the decay rate constant in units of s-1, and t is in seconds. Find an expression for the rate of change of D with respect to time.
A. D'(t) = kPoe-kt B. D'(t) = -kPoe-kt C. D'(t) = kPoe-kt - 1 D. D'(t) = Po + Poe-kt