Use counting rules to determine the probability.An elevator has 4 passengers and 8 floors. Find the probability that no 2 passengers get off on the same floor considering that it is equally likely that a person will get off at any floor.
A. 0.610
B. 0.500
C. 0.910
D. 0.410
Answer: D
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Use a graphing calculator to solve the system by finding A-1 and A-1B. (Round to the nearest integer if necessary.) 3x - 8y - z = -27 x - 3y - 3z = -16-8x + y + z = -33
A. {(5, 5, 2)} B. {(5, 2, 5)} C. {(6, 3, 2)} D. {(5, -5, -2)}
Bernie invested a sum of money 7 year(s) ago in a savings account, which has since paid interest at the rate of 8% / year compounded quarterly. His investment is now worth $22,927.66. How much did he originally invest? Round your answer to the nearest cent. ?
A. $12,924.83 B. $13,169.06 C. $13,006.24 D. $13,087.65 E. $13,250.47
Decide whether the slope is positive, negative, zero, or undefined.
A. Undefined B. Positive C. Negative D. Zero
Find the surface area, suppose, that a = 2 ft, L = 10 ft.a
a. 84 ft²
b. 40 ft²
c. 44 ft²
d. 24 ft²