Identify the base and the exponent for the exponential expression.-(-3)8
A. Base: -3, exponent: 8
B. Base: 8, exponent: 3
C. Base: 3, exponent: 8
D. Base: 8, exponent: -3
Answer: A
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Estimate the result of the calculation. Use your estimate to determine if the result appears to be correct or incorrect.
A. Incorrect. Estimate: 700,000 B. Correct. Estimate: 400,000 C. Incorrect. Estimate: 500,000 D. Incorrect. Estimate: 600,000
Factor completely.x4 + 2x2 - 80
A. (x2 - 8)(x2 - 10) B. (x2 - 10)(x2 + 8) C. (x2 - 10)(x2 + 1) D. (x2 - 8)(x2 + 10)
Solve. Then graph. Write the solution set using both set-builder notation and interval notation.
> 7 
A. {x
x < 21}, (-?, 21)
B. {x
x ? 21}, (-?, 21]
C. {x
x ? 21}, [21, ?)
D. {x
x > 21}, (21, ?)
In a normal distribution, what percent of the data lie above 1 standard deviation of the mean? Round your answer to one decimal place.
a. 13.6% b. 27.2% c. 31.8% d. 15.9 % e. 4.6%