Solve the problem. Round to the nearest hundredth, if necessary.The average size of the fish in a lake is 11.4 inches, with a standard deviation of 3.2 inches. Find the percentage of fish longer than 17 inches.
A. 4.01%
B. 8%
C. 1.75%
D. 95.99%
Answer: A
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Solve the problem.Two plumbers make house calls. One charges $95 for a visit plus $30 per hour of work. The other charges $80 per visit plus $40 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 1.5 hr C. 0.5 hr D. 1 hr
Use a graphing calculator to solve the nonlinear system. Give x- and y-coordinates to the nearest hundredth.y = e2x+32x + y = 3
A. {(0.75, 4.50)} B. {(-0.75, 4.50)} C. {(-0.75, -4.50)} D. {(0.75, -4.50)}
Perform the indicated operations. Write the resulting polynomial in standard form.(4x2 + 4x + 7) + (2x2 + 3x + 2) - (5x + 2)
A. 6x2 + 2x + 7 B. 4x2 + 2x + 11 C. 6x2 + 2x + 11 D. 4x2 + 2x + 7
Identify the type of sampling described by the proposal.An education researcher randomly selects 60 of the nation's junior colleges and interviews all of the professors at each school.
A. stratified sample B. cluster sample sample C. convenience sample D. simple random sample E. systematic sample