Use front-end rounding to round each number. Then, add or subtract the rounded numbers to get an estimated answer. Finally, find the exact answer.estimateexact 
A. Estimate: $18; exact: $17.39
B. Estimate: $14; exact: $17.49
C. Estimate: $18; exact: $17.49
D. Estimate: $18; exact: $17.41
Answer: A
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For a certain species of cricket, the temperature T, in degrees Fahrenheit, can be estimated from the number n of cricket chirps per minute. The relationship is
.
?
A: Find a formula that expresses the number of chirps per minute as a function of the temperature.B: How many chirps per minute can be expected if the temperature is 55.00 degrees Fahrenheit?
What will be an ideal response?
Reduce the fraction to simplest form.
A. -1
B. 
C. 1
D. 
Find the indicated quantities for the appropriate geometric sequence.The sum of the first three terms of a geometric sequence equals thirty-one times the first term. Find the common ratio.
A. -6, 5 B. -5, 6 C. -6, -5 D. 5, 6
Solve the problem.The surface area of a cylindrical can is represented by the polynomial expression ? r2 + ? r2 + 2?rh, where h is the height of the can and r is its radius. Find a polynomial expression for the surface area of a can whose radius and height are equal.
A. 8?r2 or 8?h2 B. 16?r2 or 16?h2 C. 4?r2 or 8?h2 D. 4?r2 or 4?h2