Use the Negative Exponent Rules to simplify. Write the answer with positive exponents. All variables are nonzero.
-3
A. - 
B. 
C. - 
D. 
Answer: D
Mathematics
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Solve the problem.In 1984, the life expectancy for a female born in the United States was 75.7 years and was increasing at a rate of 0.25 years per year. Assume that this rate of increase remains constant. Using an appropriate linear equation as a model, estimate the life expectancy of a female born in the U.S. in 1998.
A. 80.20 years B. 79.20 years C. 89.20 years D. 3.50 years
Mathematics
Evaluate the expression.
A. 60 B. 1 C. 30 D. 120
Mathematics
Find the difference. Write the difference in lowest terms. 13 - 5
A. 7
B. 12
C. 8
D. 8
Mathematics
Use properties of rational exponents to simplify the expression. Assume that any variables represent positive numbers.(144x4y8)1/2
A. 12x9/2y9/2 B. 12x2y4 C. 12x7/2y7/2 D. 72x2y4
Mathematics