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
Answer: C
Mathematics
You might also like to view...
Solve the problem.If two sound sources at the same volume are equidistant from a microphone, the pressure on the microphone is given by p = a cos ?1t + a cos ?2twhere a, ?1, ?2 are constants and t is time. Write p as a product of cosine functions.
What will be an ideal response?
Mathematics
State the end behavior of the graph of f.f(x) = 2x3 - 2 - x4
A. Down on left side, up on right side B. Up on both sides C. Up on left side, down on right side D. Down on both sides
Mathematics
Write an equation for the line described. Give your answer in slope-intercept form.m = 
, b = -3
A. y = -3x + 
B. y = 
x + 3
C. y = 
x - 3
D. 
x - 3y = 0
Mathematics
Find a cofunction with the same value as the given expression.csc 
A. cot 
B. csc 
C. sec 
D. csc 
Mathematics