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)) = 
?t9
B. S(r(t)) = 
?t3
C. S(r(t)) = 
?t6
D. S(r(t)) = 
?t6
Answer: C
Mathematics
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Refer to the right triangle ABC with C = 90°.Assuming that a = 6 and b = 8, find c.
A. 7 B. 10 C. 5 D. 9
Mathematics
Solve.Given that a1 = -4, a2 = -4 and an+2 = an+1 - 4an, what is the fifth term of this recursively defined sequence?
A. a5 = -308 B. a5 = 764 C. a5 = -20 D. a5 = 28
Mathematics
Multiply.(x2 - 7)2
A. x4 + 49 B. x4 - 7x + 49 C. x4 - 7x2 + 49 D. x4 - 14x2 + 49
Mathematics
Solve the problem.In the street map shown below, how many routes are there from A to B (with no backtracking)? 
Fill in the blank(s) with the appropriate word(s).
Mathematics