Evaluate the expression without using a calculator.-2431/5
A. 243
B. 81
C. -27
D. -3
Answer: D
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Solve the problem.A = ?r2, where r is the radius, in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 4.0 cm to 3.9 cm? (Use 3.14 for ?.)
A. 2.5 cm2 B. 1.3 cm2 C. 2.3 cm2 D. 2.7 cm2
Use a power regression model for the following data to answer the following question. If x is increased by 37%, what is the effect on y? x 1 3 4 7 8 y 13.11 3.36 2.19 1.04 1.22?
A. y is increased by 31.68%. B. y is increased by 4.33%. C. y is decreased by 4.33%. D. y is decreased by 31.68%.
Find the indicated matrix.Let A = 
and B = 
. Find A + B.
A. 
B. 
C. 
D. 
Evaluate the radical expressions or indicate that the root is not a real number.
A. -2 B. 10 C. 2 D. Not a real number