Solve the problem.Use the comparison line graph to determine how many more hours David needed to prepare for Test 2 than Jennifer.
A. 2
B. 1
C. 4
D. 3
Answer: A
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Find the correlation coefficient.The test scores of 6 randomly picked students and the number of hours they prepared are as follows: 
A. -0.2241 B. -0.6781 C. 0.6039 D. 0.2015
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 700e-0.192t, where t is the time in years? Round to the nearest hundredth year.
A. 34.12 years B. 3.61 years C. 37.73 years D. 134.40 years
Solve the problem.A bag of chips weighs 24 ounces. A serving size is 
ounce. How many servings are in the bag of chips?
A. 32 servings
B. 6
servings
C. 9
servings
D. 18 servings
Determine the phase shift of the function.y = 4 cos (4?x + 5)
A. 5 units to the left
B. 
units to the right
C. 
units to the left
D. 5 units to the right