For the functions f(x) and g(x), determine the domain of (f ? g)(x) (the product of f and g).f(x) = 
, g(x) = 
A. {x ? x is a real number and x ? 5 and x ? -10}
B. {x ? x is a real number}
C. {x ? x is a real number and x ? 0}
D. {x ? x is a real number and x ? -5 and x ? 10}
Answer: A
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Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 4 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Rewrite the equation in the form y = A sin (x + ?). Round ? to three decimal places.y = 12 sin x + 16 cos x
A. 20 sin (x - 0.927) B. 20 sin (x + 0.927) C. 20 sin (x + 1.568) D. 20 sin (x - 1.568)
Subtract.-7 - 13
A. 6 B. 20 C. -20 D. -6
Factor out the greatest common factor.(x - 7)(x + 9) + (x - 7)(x + 3)
A. (x - 7)(2x + 12) B. 2(x - 7)(2x + 12) C. 2(x - 7)(x + 6) D. (x - 7)(x + 12)