Write the whole number in expanded form.30,490
A. 3000 + 400 + 9
B. 3000 + 40 + 9
C. 30,000 + 4000 + 90
D. 30,000 + 400 + 90
Answer: D
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What will be an ideal response?
Solve the problem.A quality-control inspector examined 290 calculators and found 15 of them to be defective. At this rate, how many defective calculators will there be in a batch of 15,370 calculators?
A. 4 calculators B. 53 calculators C. 795 calculators D. 4350 calculators
Solve the problem.The Smith family plans to carpet their new family room which is 30 feet long and 18 feet wide. The carpeting costs $5 per square yard. How many square yards will the family need and what will be the total cost for the carpeting?
A. 540 yd2; $2700 B. 60 yd2; $300 C. 60 ft2; $900 D. 16 yd2; $80
?A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window (see figure). Find the dimensions of a Norman window of maximum area if the total perimeter is 22 feet. Round yours answers to two decimal places.
?
A. ?
feet and 
feet
B. ?
feet and 
feet
C. ?
feet and 
feet
D. ??
feet and 
feet
E. ??
feet and 
feet