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.What is 8.48 less 2.742?
A. Estimate: 6; exact: 6.738
B. Estimate: 5; exact: 5.738
C. Estimate: 6; exact: 6.748
D. Estimate: 5; exact: 5.748
Answer: B
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Solve the problem.Find the range and the standard deviation of the following prices of notebook computers: 
A. Range = $250; standard deviation = $118.38 B. Range = $275; standard deviation = $116.17 C. Range = $275; standard deviation = $137.50 D. Range = $116.17; standard deviation = $275
Find the exact value of the trigonometric expression without the use of a calculator.If sin ? = - 
, 
< ? < 2? and cos ? = - 
, ? < ? < 
, find the exact value of sin (? - ?).
A. 
B. 
C. 
D. 
Provide an appropriate response.Show that f(x, y, z) = ex2 + y2 + z2 is continuous at the origin.
What will be an ideal response?
Without using a calculator, determine whether the first number is divisible by the second number.Is 22,233 divisible by 2?
A. Yes B. No