Multiply or divide and write scientific notation for the result.
A. 9.3 × 105
B. 9.3 × 10-3
C. 9.3 × 10-17
D. 29.9 × 10-17
Answer: C
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Write the following in words.0.87
A. Eighty-seven hundredths B. Eighty-seven thousandths C. Eighty-seven hundred-thousandths D. Eighty-seven tenths
Find the mean for the given sample data.Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. 
A. 57.8 years B. 58.0 years C. 58.5 years D. 59.1 years
Solve. The amount in an account earning interest compounded annually is given by the expression 
where P is the principal amount invested, r is the rate of return per year (in decimal form), and t is the number of years that the money has been invested. First, write a polynomial that shows the amount in the account after 2 years if 2000 is invested. Then, write a polynomial that gives the difference between the amount of money in the account after 2 years as compared to 1 year.
A. After 2 years: (2000r2 + 4000r + 20) dollars; Difference: (2000r2 + 4000r) dollars B. After 2 years: (2000r2 + 4000r + 2000) dollars; Difference: (2000r2 + 2000r) dollars C. After 2 years: (2000r2 + 2r + 1) dollars; Difference: (2000r2 + r) dollars D. After 2 years: (2000r2 + 2000) dollars; Difference: (2000r2 - 2000r) dollars
Solve the equation for x.
= 6
A. {2} B. {12} C. {6} D. {-4}