Solve the problem.If a fair coin is tossed twice, the probability that both tosses will come up heads is
A. 
.
B. 
.
C. 
.
D. 
.
E. none of these
Answer: D
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (t + 5)i + (ln(cos t) - 3)j + 2k
A. a = (sec t tan t)T + (sec t)N B. a = (sec t tan t)T - (sec t)N C. a = (-sec t tan t)T + (sec t)N D. a = (-sec t tan t)T - (sec t)N
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = sin-1(x2 + y2)
A. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
C. Domain: all points in the xy-plane; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0,0) and radii r, 0 < r ? 1
Find the tax. Use $3700 for each personal exemption; a standard deduction of $5800 for single people, $11,600 for married people filing jointly, $5800 for married people filing separately, and $8500 for head of a household; and the tax rate schedule. 
Megan Cortez had an adjusted gross income of $51,453 last year. She had deductions of $886 for state income tax, $570 for property tax, $3809 in mortgage interest, and $605 in contributions. Cortez claims one exemption and files as a single person.
A. $7520.75 B. $6595.75 C. $8063.25 D. $8988.25
Change the decimal to a percent.1.908
A. 209.88% B. 2098.8% C. 1908% D. 190.8%