Solve. Simplify the answer.Erika spent 
hr on her computer visiting the history channel and the discovery channel websites. She spent 
hr at the history channel website. How many hours did she spend at the discovery channel website?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer: A
Mathematics
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Write the negation of the statement.q ? (p ? r)
A. ~q ? (p ? r) B. ~q ? (p ? r) C. ~q ? ~(p ? r) D. q ? ~(p ? r)
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Find the derivative of the function by using the definition.y = 11 - 7x2
A. -14x2 B. 11 - 14x C. -14x D. 11 - 7x
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Add and simplify. Write the answer as a mixed numeral if possible.9 + 3
A. 9
B. 13
C. 12
D. 13
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Find the present value. Round to the nearest cent.To get $5600 after 11 years at 11% compounded annually
A. $3172.83 B. $3823.21 C. $1776.79 D. $1972.23
Mathematics