Simplify. Write your answers in the form of a+bi, where a and b are real numbers.8i(5 - 5i)
A. 40i + 40i2
B. - 40i - 40i2
C. 40i - 40
D. 40 + 40i
Answer: D
Mathematics
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Find the derivative of y.y = csch 
A. -csch 
coth 
B. csch 
coth 
C. 
csch 
coth 
D. - 
csch 
coth 
Mathematics
Solve.
= 
A. 0.12 B. 5.775 C. 2.6 D. 0.58
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Use formulas for perimeter and area to solve the problem.Tara has a rectangular lot that measures 78 feet by 87 feet and wishes to use fencing to enclose the garden. How much fencing does she need?
A. 660 ft B. 165 ft C. 6,786 ft D. 330 ft
Mathematics
Find the exact value of y, or state that y is undefined.y = tan-1 
A. 
B. - 
C. 
D. 
Mathematics