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: B
Mathematics
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Find the inverse of the function.f(x) = 5x + 3
A. f-1(x) = 
B. f-1(x) = 
- 3
C. f-1(x) = 
D. Not a one-to-one function
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Let x represent the number. Use the given conditions to write an equation. Solve the equation and find the number.Four times the difference of 11 and a number gives 60. Find the number.
A. -16 B. 16 C. -4 D. 4
Mathematics
Determine whether (f ? g)(x) = x and whether (g ? f)(x) = x.f(x) = x3 + 1, g(x) = 
A. Yes, no B. No, yes C. No, no D. Yes, yes
Mathematics
Simplify the expression by using a sum or difference identity.cos(12k) cos (9k) - sin(12k) sin (9k)
A. sin(21k) B. cos(3k) C. sin(3k) D. cos(21k)
Mathematics