Solve the problem.The surface area of a balloon is given by S(r) = 4?r2, where r is the radius of the balloon. If the radius is increasing with time t, as the balloon is being blown up, according to the formula 
find the surface area S as a function of the time t.
A. S(r(t)) = 
?t6
B. S(r(t)) = 
?t9
C. S(r(t)) = 
?t3
D. S(r(t)) = 
?t6
Answer: D
Mathematics
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Indicate whether the function is one-to-one.{(-10, 4), (-15, 4), (-16, 1)}
A. Yes B. No
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Use the fundamental identities to find the value of the trigonometric function.Given that tan 
= -0.4, find cot ?.
A. 2.5 B. -2.5 C. 0.4 D. -0.4
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Round the money amount to the specified place.$3999.61 to the nearest dollar
A. $3000 B. $4 C. $3999.6 D. $4000
Mathematics