Evaluate the expression without using a calculator, and write your answer in radians.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: A
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Show that the set has cardinal number ?0 by establishing a one-to-one correspondence between the set of counting numbers and the given set. Be sure to show the pairing of the general terms in the sets.
A.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
B.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
C.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
D.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
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
Use a vertical format to subtract the polynomials.9x6 - 2x5 + 2x4 + 4 
A. 11x6 + 3x5 - 4x4 - 3 B. 7x6 + 3x5 - 4x4 + 11 C. 7x6 - 7x5 + 8x4 - 3 D. 11x6 + 3x5 - 4x4 + 11
Simplify. Leave your answer in exponent form.(b4)5
A. 5b4 B. b20 C. b5 D. b9