Graph the pair of parametric equations in the rectangular coordinate system.x = 2 sin t, y = 2 cos t; 0 ? t ? 2? 
A. 
B. 
C. 
D. 
Answer: C
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Solve the system of equations by use of determinants. y + z = 93x- z = 2 2x + y + 3z = 7
A. x = 
, y = 
, z = - 
B. x = 
, y = 
, z = - 
C. x = 
, y = 
, z = - 
D. x = - 
, y = - 
, z = 
Use a calculator with a 
key or a 
key to solve the problem.The exponential function f(x) = 47.36(1.027)x describes the population of a certain country, y, in millions, in year x. a) Substitute 0 for x and, without using a calculator, find the country's population in year 0. b) Find the country's population in year 27 as predicted by this function.
A. a) 1 million; b) 102.554 million B. a) 47.36 million; b) 97.233 million C. a) 47.36 million; b) 99.858 million D. a) 1.027 million; b) 94.677 million
Evaluate the double integral.
dy dx
A. 
ln 2
B. 
ln 2
C. 
ln 4
D. 6 ln 2
Find the difference.-15 - (-12)
A. -3 B. 3 C. 27 D. -27