Find the exact value of y, or state that y is undefined.y = cot-1 
A. 
B. 
C. 
D. 0
Answer: C
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Find the tax in the following application problems. Use $4050 for each personal deduction, a standard deduction of $6300 for single taxpayers, $12,600 for married taxpayers filing jointly, $6300 formarried taxpayers filing separately, and $9300 for head of household and the tax rate schedule.
Megan Cortez had an adjusted gross income of $55,704 last year. She had deductions of $939 for state income tax, $764 for property tax, $3,890 in mortgage interest, and $1,294 in contributions. Cortez claims one exemption and files as a single person.
A. $8,329.25 B. $10,051.00 C. $7,676.00 D. $6,963.00
Solve.The braking distance D in feet required for a car traveling x miles per hour to stop on wet, level pavement can be approximated by 
Calculate the braking distance for 41 miles per hour. If necessary, round the answer to the nearest tenth of a foot.
A. 369 ft B. 4.6 ft C. 186.8 ft D. 1681 ft
A small manufacturing plant produces three kinds of bicycles-three-speed, five-speed and ten-speed-in two factories. Factory A produces 16 three-speeds, 12 five-speeds and 30 ten-speeds in one day, while factory B produces 15 three-speeds, 18 five-speeds and 20 ten-speeds in one day. An order is received for 30 three-speeds, 40 five-speeds, and 50 ten-speeds. It costs $1200 a day to operate factory A and $3000 a day to operate factory B. The manufacturer chooses the number of days to operate each factory in order to minimize cost.In the situation above, the objective function is
A. 58x + 53y. B. 1200x + 3000y. C. 3000x + 1200y. D. 30x + 40y + 50z. E. none of these
Find fx(x, y).f(x, y) = ex-y
A. fx(x, y) = -ex-y B. fx(x, y) = xex-y C. fx(x, y) = -yex-y D. fx(x, y) = ex-y