Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Answer: B
Mathematics
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Solve the problem.The electric power P (in W) as a function of the current i (in A) in a certain circuit is given by 
Find the instantaneous rate of change of P with respect to i for i = 0.6 A.
A. 74 W/A B. 44.4 W/A C. 69.6 W/A D. 92 W/A
Mathematics
Solve the differential equation.3y" + 29y' + 40y = 0
A. y = c1e-8x + c2e-5x/3 B. y = c1e8x + c2e5x/3 C. y = c1e-8x + c2e5x/3 D. y = c1e-8x + c2e-5x
Mathematics
Solve.
= 6
A. 36 B. 35 C. 49 D. 37
Mathematics
Solve.The average summer temperature in the Antarctica was -25°F and the average winter temperature was 
How much higher was the summer average temperature?
A. 31°F B. -81°F C. -31°F D. 81°F
Mathematics