Solve the problem.An average score of 90 for 5 exams is needed for a final grade of A. John's first 4 exam grades are 79, 89, 97, and 95. What range of scores on the fifth (and last) 100-point exam will guarantee John an A in the course?
A. 95 to 100
B. 85 to 100
C. 90 to 100
D. 99 to 100
Answer: C
Mathematics
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Use the graph of the piecewise function f(x) to find the following.(f ? f)(-3)
A. 1 B. 3 C. 0 D. 2
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Find all the complex roots. Write the answer in the indicated form.The complex square roots of 4 + 4
i (rectangular form)
A. 
+ 
i, - 
- 
i
B. - 
- 
i, 
- 
i
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
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Perform the indicated operation and simplify if possible.
÷ 
A. 
B. 
C. 
D. 
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Find the monthly house payment necessary to amortize the following loan.$561,000 at 7.1% for 15 years
A. $3319.26 B. $39,194.63 C. $5073.84 D. $5917.33
Mathematics