Solve the differential equation.y ' e4x + 4ye4x = 4x
A. y = 2x2e-4x + Ce-4x
B. y = 2x2e4x + Ce4x
C. y = 4x2e4x + Ce4x
D. y = 4x2e-4x + Ce-4x
Answer: A
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Refer to the double-bar graph below which shows the number of male (M) and female (F) athletes at a university over a four-year period. Solve the problem. 
YEARHow many female athletes were there in 1987?
A. 300 B. 500 C. 200 D. 150
Determine whether the given equation is an identity.
+ 
= - 
A. Yes B. No
Find the following using a calculator. Round to four decimal places.log (-6)
A. 1.9459 B. 1.7918 C. 5 D. Does not exist
Find the mean, median, and mode for the table. The table shows the distribution of households, according to the number of motor vehicles per household. Number ofProportion ofmotor vehicleshouseholds00.1610.2220.3830.1440.095 or more0.01?
A. mean is 1.84; median is 2; mode is 2 B. mean is 1.79; median is 0; mode is 4 C. mean is 1.80; median is 1; mode is 1 D. mean is 1.81; median is 2; mode is 2 E. mean is 1.81; median is 3; mode is 2