Evaluate the expression for the given replacement values. Write the answer in simplest form.
for x = 
, y = 
, z = 
A. 
B. 
C. 
D. 
Answer: D
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For the given polar equation, write an equivalent rectangular equation.r2 = 50r cos ? - 6r sin ? - 9
A. 50x - 6y = 9 B. (x - 25)2 + (y + 3)2 = 9 C. (x + 50)2 + (y - 6)2 = 9 D. (x - 25)2 + (y + 3)2 = 625
Divide and check the answer.
A. 18x7 - 30x2 + 1 B. 3x9 - 5x4 + x C. 3x8 - 5x3 + x2 D. 3x7 - 5x2 + x
Find the median of the random variable x with the probability density function defined on the indicated interval I. The median of x is defined to be the number m such that 
. Observe that half of the x-values lie below m and the other half lie above m.
?
?
__________
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The population of a formerly endangered mouse is now on the rise. The population, N, over the last 8 years can be represented with the following graph:
When was the mice population the lowest?
A. Just after the end of the third year. B. At the beginning of the 8 year period. C. Just before the end of the second year. D. During the fifth year.