Solve the problem.Jeremy switches from drinking regular soda to drinking diet soda. If his regular soda contains 320 mg of sodium per liter and the diet soda contains 300 mg of sodium, find his percent decrease in calories by switching from regular to diet soda.
A. 51.6%
B. 6.7%
C. 6.3%
D. 93.8%
Answer: B
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Solve the system by the substitution method.
A. {(4, -1), (2, -7)} B. {(-1, 4), (-3, 6)} C. {(-1, 4), (-7, 2)} D. {(4, -1), (6, -3)}
Find the solution set of the system by graphing the equations by hand. If the system is inconsistent or dependent, say so.
A. (1, 2) B. (1, -2) C. (2, -1) D. (2, 1)
Find the integral.
A. 
z(3z2 - 7)3/2 + C
B. z(3z2 - 7)3/2 + C
C. 
(3z2 - 7)3/2 + C
D. (3z2 - 7)3/2 + C
Solve the problem.Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken is walking at the rate of 4.7 feet per second. Find a function, d(t), which gives the distance Ken is from the streetlight in terms of time. Find a function, 
, which gives the length of Ken's shadow in terms of d. Then find 
.
A. (S ? d)(t) = 4.47t B. (S ? d)(t) = 7.94t C. (S ? d)(t) = 3.53t D. (S ? d)(t) = 2.59t