Evaluate the expression.-73
A. 21
B. -21
C. -343
D. 343
Answer: C
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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceA baseball is hit when it is 2.2 ft above the ground. It leaves the bat with an initial velocity of 
at a launch angle of 22°. At the instant the ball is hit, an instantaneous gust of wind blows against the ball, adding a component of -12.8i (ft/sec) to the ball's initial velocity. Find a vector equation for the path of the baseball.
A. r = (152 sin 22° - 12.8)ti + (2.2 + (152 cos 22°)t - 16t2)j B. r = (152 cos 22° - 12.8)ti + (2.2 + (152 sin 22°)t - 16t2)j C. r = ((152 cos 22°)t - 12.8)i + (2.2 + (152 sin 22°)t - 16t2)j D. r = (152 cos 22° - 12.8)ti + (2.2 + (152 sin 22°)t + 16t2j
Use the 68-95-99.7 rule to solve the problem.The amount of Jen's monthly phone bill is normally distributed with a mean of $80 and a standard deviation of $10. Fill in the blanks.68% of her phone bills are between $___ and $___.
A. 60, 100 B. 80, 90 C. 60, 80 D. 70, 90
Evaluate and simplify.If f(x) = 3x - x3, find f 
.
A. 
B. 
C. 
D. 
Use the data set {d1, d2, d3, ..., d256} consisting of 256 numbers to answer the following question(s).After sorting the data set (in increasing order from left to right), the 10th percentile is the number
A. the number in the 26th position. B. the average of the numbers in the 25th and 26th positions. C. the number in the 25th position. D. the number in the 10th position. E. none of these