Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = x2 + 12x 
A. vertex (6, -36)
intercepts (0, 0), (12, 0)
B. vertex (-6, 36)
intercept (0, 72)
C. vertex (-6, -36)
intercepts (0, 0), (- 12, 0)
D. vertex (6, 36)
intercept (0, 72)
Answer: C
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Solve the problem by integration.The current i (in A) as a function of the time t (in s) in a certain electric circuit is given by 
Find the total charge that passes a given point in the circuit during the first three seconds.
A. 1.276 C B. 11.486 C C. 3.829 C D. 3.807 C
Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = csc(cot x)
A. y = csc u; u = cot x; 
= csc(cot x) cot(cot x) csc2 x
B. y = cot u; u = csc x; 
= csc2(csc x) csc x cot x
C. y = csc u; u = cot x; 
= csc3 x cot x
D. y = csc u; u = cot x; 
= - csc(cot x) cot(cot x)
Solve the problem.In the formula N = Iekt, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. There are currently 63 million cars in a certain country, increasing by 5.1% annually. How many years will it take for this country to have 86 million cars? Round to the nearest year.
A. 5 years B. 3 years C. 61 years D. 6 years
Simplify, where possible.6a - 4b + 2
A. -2a + 2 B. 2ab + 2 C. 6a - 4b + 2 D. 4ab