Evaluate the expression.(-4)-2
A. - 
B. -16
C. 
D. 16
Answer: C
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Find the area of the shaded region.
A. ? - 2 B. ? C. 2 D. ? + 2
Suppose 
. Find 
if 
data-wiris-created="true" varid="variable_id_field" variablename="impvar_9ff4fe0b92984a2ab91df9792" />.
?
A. ?
B. 
C. ?
D. ?
Solve the problem.In one study the maximum heart rates of conditioned athletes were examined. A group of athletes was exercised to exhaustion. Let x represent an athlete's heart rate five seconds after stopping exercise and y represent an athlete's heart rate ten seconds after stopping exercise. It was found that the maximum heart rate H for these athletes satisfied the following two equations. H = 0.491 x + 0.468 y + 11.2 H = -0.981 x + 1.872y + 26.4If an athlete had a maximum heart rate of H = 151, determine the value of x graphically to the tenths place.
A. x = 148.2 B. x = 147.6 C. x = 147.1 D. x = 147.9
Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k ; 
B. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k; 
C. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k; 
D. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k; 