Find the length of the curve.The spiral r = 4?, 0 ? ? ? ?
A. 
B. 4
C. 
((?2 + 1)3/2 - 4)
D. 2(?
+ ln (? + 
))
Answer: D
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Solve the problem.To measure the width of a river, a surveyor starts at point A on one bank and walks 72 feet down the river to point B. He then measures the angle ABC to be 
Estimate the width of the river to the nearest foot. See the figure below. 
A. 66 ft B. 173 ft C. 30 ft D. 28 ft
Solve the equation.
= 
- 
A. {18} B. no solution C. {9, 18} D. {9}
Use the graph of a power function and transformations to sketch the graph of the polynomial function.f(x) = - 
x5
A. 
B. 
C. 
D. 
Solve the problem.If P dollars are invested at a simple interest rate r (in decimals), the amount A that will be available after t years is A = P + Prt. Find the total amount in an account if $400 is invested at 19.1% simple interest for 3.5 years.
A. $267.40 B. $667.40 C. $473.30 D. $476.40