Simplify by rationalizing the denominator. Write your answer in a + bi form.

A. i
B. - i
C. i
D. - i


Answer: B

Mathematics

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Find the LCD for the list of rational expressions. , 

A. t - 2 B. t C. t(t - 2) D. 54

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Solve the problem.Sarah has a collection of marbles. She notices that if she borrows 4 marbles from a friend, then she can arrange the marbles in rows of 13 each. What is the remainder when she divides her original number of marbles by 13?

A. 8 B. 7 C. 9 D. 10

Mathematics

Solve the problem.If money is invested for 3 years with interest compounded annually, the future value of the investment varies directly as the cube of 1 + r, where r is the interest rate. If the future value of the investment is $9317.00 when the rate is 10%, what rate gives a future value of $8575.30? Round to the nearest whole percent.

A. 6% B. 8% C. 7% D. 9%

Mathematics

Use the quotient rule to simplify.

A. 2x2
B. x2 
C. x2 
D. 2x2

Mathematics