Find, if possible, AB and BA.A = 
, B = 
A. AB = 
, BA = 
B. AB = 
, BA = 
C. AB = 
, BA = 
D. AB = 
, BA = 
Answer: C
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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 5 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) = 
Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= - 8?7 cos ? + ?8 sin ?
D. 
= 8?7 sin ? - ?8 cos ?
Find the indicated coefficient or term.The 3rd term in the expansion of (4x + 5)3
A. 600x B. 25 C. 300x D. 240x2
Solve. Write the fraction in simplest form.A restaurant has a capacity of 221 patrons. If the restaurant is 
full, how many patrons are at the restaurant?
A. 52 patrons B. 48 patrons C. 56 patrons D. 13 patrons