Solve the problem.A generator produces an alternating current according to the equation 
where t is time in seconds and I is the current in amperes. What is the smallest time t such that 
A. 
sec
B. 
sec
C. 
sec
D. 
sec
Answer: A
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Determine if the given function y = f(x) is a solution of the accompanying differential equation.Differential equation: 3xy' + 3y = cos xInitial condition: y(?) = 0Solution candidate: y = 
A. No B. Yes
Perform the indicated operation and express in lowest terms.
- 
A. 
B. 
C. 
D. 
Solve the problem.A formula relating an athlete's vertical leap V, in inches, to hang time t, in seconds, is V(t)= 48t2. A professional basketball player has a vertical leap of 38 inches. What is his hang time? Round your answer to the nearest tenth of a second.
A. 0.8 sec B. 0.9 sec C. 0.6 sec D. 1 sec
Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x| ? 0.1, |y| ? 0.1
A. |E| ? 11.388 B. |E| ? 6.5074 C. |E| ? 3.2537 D. |E| ? 5.694