Find the exact perimeter. Then approximate your answer to the nearest tenth.
A. 13
+ 4
, 29.7
B. 9
, 50.9
C. 42, 42.0
D. 21
, 29.7
Answer: D
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Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = cos x + 3, [0, 2?], right-hand endpoint
A. 
B. 
C. 
D. 
Solve the system of equations by the addition method.
A. (6, 2) B. (-7, 2) C. (-6, 1) D. no solution
Determine whether the function satisfies a Laplace equation.f(x, y, z) = cos(8x) sin(8y) e(
z)
A. Yes B. No
Find the real zeros, if any, of each quadratic function using the quadratic formula. List the x-intercepts, if any, of the graph of the function. f(x) = 4x2 - 25x - 21
A. x = - 
, x = 14
B. x = - 
, x = 7
C. x = -3, x = 7
D. x = 
, x = -7