Solve the problem.Brandon can paint a fence in 12 hours and Elaine can paint the same fence in 11 hours. How long will they take to paint the fence if they work together?
A. 5
hr
B. 5
hr
C. 11
hr
D. 5
hr
Answer: A
Mathematics
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Use a computer algebra system (CAS) to solve the given initial value problem.y' = 
, y(0) = 4
A. y = 8 tan-1 x - 4x
B. y = 4 ln
- 4x + 4
C. y = 5 tan-1 x - x + 4
D. y = 8 tan-1 x - 4x + 4
Mathematics
Determine whether the given function is positive or negative for values of t in the specified quadrant. Quadrant IV, sin t
A. Negative B. Positive
Mathematics
Write the whole number in standard form.Twenty thousand, five hundred forty-four
A. 20,044 B. 200,544 C. 20,544 D. 2544
Mathematics
Solve the problem.The recipe for a chocolate chip cake calls for 
pound of chocolate chips. If a bakery wants to make 20 cakes, how many pounds of chocolate chips will they need?
A. 20 pounds B. 5 pounds C. 16 pounds D. 4 pounds
Mathematics