Solve the problem.Scores on a certain test have been found to be distributed normally with a mean of 64 and a standard deviation of 13. What is the standard error in the mean for all samples of 196 test scores?
A. 0.929
B. 0.657
C. 0.066
D. 4.571
Answer: A
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Find the particular solution to the given differential equation that satisfies the given conditions.x dx + y dy = 4
dx; x = 0 when y = 1
A. ln 
= 8x - 8
B. ln 
= 8x
C. ln 
= 8x + c
D. ln 
= 8y - 8
Find average for each set of numbers.85, 79, 71, 75, 85
A. 71 B. 85 C. 79 D. 78
Complete the table of ordered pairs for the given linear equation; then plot the solution.5x + 2y = 10
A. 
B. 
C. 
D. 
Solve the problem.A retailer knows that n games can be sold in a month at a price of 
dollars per game. Assume that he buys each game for 
and sells every one that he buys. If he wishes to make a profit of at least 
per month on sales of this game, how many games must he sell each month?
A. 25 ? n ? 35 B. 20 ? n ? 50 C. 20 ? n ? 70 D. 0 ? n ? 20