Find the unit tangent vector of the given curve.r(t) = (8t cos t - 8 sin t)j + (8t sin t + 8 cos t)k
A. T(t) = - 
(sin t)j + 
(cos t)k
B. T(t) = (-sin t)j + (cos t)k
C. T(t) = (8 cos t)j - (8 sin t)k
D. T(t) = (-8 sin t)j + (8 cos t)k
Answer: B
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Simplify.
A. 
B. 
C. 
D. 
Solve.Alison sets aside 
each month to spend on books and CDs. If she spends c dollars on CDs in a given month she may spend b dollars on books where 
Graph the equation and use the graph to estimate the amount Alison may spend on books in March if she spends 
on CDs.
A. $33 B. $22 C. $29 D. $68
Solve the problem.One side of a rectangle is 5 inches and the other side is x inches. What values of x will make the perimeter at least 38?
A. x < 14 B. x ? 14 C. 0 < x ? 14 D. x ? 14
Find the present value to the nearest cent.Joshua obtained a loan of $7900 for 360 days at 12%. If the value of money is 16.3%, find the present value in 247 days.
A. $7731.50 B. $7644.75 C. $8417.34 D. $7637.83