A computer password consists of any five capital letters from the ordinary English alphabet (A through Z).How many different passwords start with the letter Z and end with the letter W?
A. 26 × 25 × 243.
B. 263
C. 243
D. 245
E. none of these
Answer: B
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Use the formula for Sn to find the sum of the first five terms of the geometric sequence.5, 20, 80, 320, . . .
A. 1715 B. 1701 C. 1705 D. 1707
Solve the variation problem.The amount of paint needed to cover the walls of a room varies jointly as the perimeter of the room and the height of the wall. If a room with a perimeter of 60 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 65 feet and 8-foot walls.
A. 52 quarts B. 520 quarts C. 10.4 quarts D. 5.2 quarts
Use the power rules for exponents to simplify. Write the answer in exponential form.
4
A. 26 B. - 28 C. - 26 D. 28
Use the given vectors to find the indicated expression.v = -3i - 5j - 3k, w = -5i + 3j - 4k, u = 4i - 5j - 2kFind u ? (v × w).
A. 55 B. 169 C. -214 D. 73