Find the range of the given function.f(x) = -5x2 + 40x - 77
A. (-?, -4]
B. [-4, ?)
C. (-?, 3]
D. [-3, ?)
Answer: C
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Solve the given differential equation. (The form of yp is given.)D2y + 25y = 3 sin 5x (Let yp = Ax sin 5x + Bx cos 5x.)
A. y = c1 sin 5x + c2 cos 5x + 
x cos 5x
B. y = c1 sin 5x + c2 cos 5x - 
x sin 5x + 
x cos 5x
C. y = c1 sin 5x + c2 cos 5x - 
x cos 5x
D. y = c1 sin 5x + c2 cos 5x - 
x sin 5x
Find the indicated function value for the function.f(x) = {
f(8)
A. 7 B. 8 C. -50 D. 58
Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.At a local market, the average weekly grocery bill is $57.85 with a standard deviation of $14.25. What is the lowest amount spent by the upper 25% of market customers?
A. $9.55 B. $67.82 C. $67.40 D. $67.54
Solve the problem.A hall 130 feet in length was designed as a whispering gallery. If the ceiling is 25 feet high at the center, how far from the center are the foci located?
Fill in the blank(s) with the appropriate word(s).