Estimate the sum as indicated. Then answer the question.Estimate the following sum by first rounding to the nearest hundred. Does the estimate give you reason to doubt the stated sum?
A. Estimate: 138,200 ; no
B. Estimate: 126,200 ; no
C. Estimate: 138,200 ; yes
D. Estimate: 126,200 ; yes
Answer: D
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Convert as indicated.10 square feet = ______ square inches
A. 120
B. 1440
C. 
D. 100
Translate the phrase to an algebraic expression. Use "x" to represent "a number". A number subtracted from - 
A. x - 
B. 
- x
C. - 
- x
D. x - 
Factor the polynomial.24m - 15n
A. 3(8m - 15n) B. 3m(8 - 5n) C. m(24 - 15n) D. 3(8m - 5n)
The experiment described suffers from at least one flaw in design. Identify the flaw and tell how the experiment can be improved.A nutritionist would like to test two different diets for their effects on arthritis. She obtains a random sample of 100 arthritis sufferers. She asks them to choose whether they would like to follow diet A (which is a particular type of vegetarian diet) or diet B (which is a particular type of nonvegetarian diet). After following their chosen diet for a two-month period, each person is asked to assess any changes in their arthritis. The changes for the two groups are compared.
What will be an ideal response?