Find 
by using the Chain Rule. Express your final answer in terms of t.w = ex cos y + ey cos x; x = -8t, y = 3t
A. e-8t(-8 cos 3t + 3 sin 3t) e3t(3 cos -8t - 8 sin -8t)
B. e-8t(-8 cos 3t - 3 sin 3t) e3t(3 cos -8t + 8 sin -8t)
C. e3t(-8 cos 3t + 3 sin 3t) e-8t(3 cos -8t - 8 sin -8t)
D. e3t(-8 cos 3t - 3 sin 3t) e-8t(3 cos -8t + 8 sin -8t)
Answer: B
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Provide an appropriate response.Suppose a population has a doubling time of 20 years. By what factor will it grow in 20 years?
A. 1 B. 2 C. 4 D. 3
Write the ratio or rate in simplest form.3.1 to 10
A. 
B. 
C. 
D. 
Graph the equation using the slope and y-intercept.y = - 2x + 1
A. 
B. 
C. 
D. 
Solve the right triangle.A = 79° 32', c = 264 m , C = 90°Round side lengths to two decimal places, if necessary.
A. B = 10° 28', a = 259.81 m, b = 54.96 m B. B = 10° 32', a = 260.81 m, b = 40.96 m C. B = 11° 18', a = 259.81 m, b = 47.96 m D. B = 10° 28', a = 259.61 m, b = 47.96 m