Calculate the area of the surface S.S is the portion of the sphere x2 + y2 + z2 = 64 between z = - 4
and z = 4
.
A. 128
?
B. 128?
C. 64
?
D. 8
?
Answer: C
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A. 
units to the right
B. 3 units to the right
C. 3 units to the left
D. 
units to the left
Solve the equation.x + 
= 7
A. 7, 10 B. 5, 2 C. -5, -2 D. 10
Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table.
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 8 months B. 12 months C. 20 months D. 10 months
Solve the problem.Using the digits 0 through 9, how many 6-digit serial numbers can be made if the the first digit must be a 1, the last digit must be a 0, and no digits may be repeated?
A. 8 B. 1680 C. 5040 D. 70