Find the mean of the random variable x associated with the probability density function over the indicated interval.
?
; 
?
A. ?
B. ?
C. 
D. ?
E. ?
Answer: C
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Solve the problem. Express your answer in scientific notation, and round to one decimal place. A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a million (106) calculations?
A. 1.4 × 102 seconds B. 1.4 × 103 seconds C. 1.4 × 10-2 seconds D. 1.4 × 10-1 seconds
How close to 2 do we have to take x so that 5x+3 is within a distance of 0.01 from 13?
What will be an ideal response?
Solve the problem. Round rates to the nearest tenth of a percent and dollar amounts to the nearest cent.Chang bought a bumper marked up 11.8% based on selling price at a local auto repair shop. If the markup is $44.85, find (a) the selling price, (b) the cost, and (c) the markup as a percent of the cost.
A. (a) $424.93 (b) $380.08 (c) 11.8% B. (a) $335.23 (b) $380.08 (c) 11.8% C. (a) $380.08 (b) $424.93 (c) 10.6% D. (a) $380.08 (b) $335.23 (c) 13.4%
Find the slope of the line that passes through the given two points. If the slope is undefined, state this.(-4, 9) and (6, -3)
A. - 
B. - 
C. - 
D. - 