Solve the problem.Derek is four times as old as Sarah. Three years ago the sum of their ages was 29. How old is each now?
A. Derek: 117 yr old; Sarah: 28 yr old
B. Derek: 29 yr old; Sarah: 117 yr old
C. Derek: 31 yr old; Sarah: 114 yr old
D. Derek: 116 yr old; Sarah: 29 yr old
Answer: D
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Identify the distribution as symmetric, left-skewed, or right-skewed.Number of siblings of adults in the U.S.
A. Right-skewed B. Symmetric C. Left-skewed
Use a spherical coordinate integral to find the volume of the given solid.the solid bounded below by the xy-plane, on the sides by the sphere 
and above by the cone 
A. 
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B. 
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C. 32?
D. 16?
Solve the problem.The number of atoms in a slice of cheese is 17,945,450,471. Round this amount to the nearest ten-thousand.
A. 17,945,000,000 atoms B. 17,945,450,500 atoms C. 17,945,450,470 atoms D. 17,945,450,000 atoms
Find the equation of the least-squares line for the given data. Draw a scatter diagram for the given data and graph the least-squares line.
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?
A. ?
B. ?
C. ?
D. ?
