Solve the problem.The velocity of a projectile fired straight into the air is given every half second. Use left endpoints to estimate the distance the projectile traveled in four seconds.
A. 459.4 m
B. 879.6 m
C. 918.8 m
D. 439.8 m
Answer: D
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Find the axis of symmetry of the function.f(x) = 3x2 - 24x + 53
A. x = 5 B. x = -5 C. x = 4 D. x = -4
Solve the problem.Jill, the tallest female in the sophomore class, has a height of 69.75 inches. The heights of sophomore females are normally distributed with mean 62.7 inches and standard deviation 2.5 inches. Determine the z-score corresponding to Jill's height.
A. z = 2.62 B. z = 2.72 C. z = 3.02 D. z = 2.82
Find the product.(12y + x)(12y - x)
A. 144y2 - 24xy - x2 B. 144y2 - x2 C. 24y2 - x2 D. 144y2 + 24xy - x2
Solve using the substitution method. Use a graphing calculator to check your answer. x + 9y = -41-7x + 9y = -73
A. (5, -6) B. (-4, -6) C. (4, -5) D. No solution