Solve the problem by estimating.As part of her preparation for soccer tryouts, Francine did 73 jumping jacks each day for 68 days. Estimate how many jumping jacks she did during that period. Round the number of jumping jacks and the number of days to the to the nearest ten.
A. 13,000
B. 4900
C. 1300
D. 49,000
Answer: B
Mathematics
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What will be an ideal response?
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
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Solve the problem.A company is constructing an open-top, square-based, rectangular metal tank that will have a volume of 
What dimensions yield the minimum surface area? Round to the nearest tenth, if necessary.
A. 9.3 ft by 9.3 ft by 0.5 ft B. 4.4 ft by 4.4 ft by 2.2 ft C. 5.1 ft by 5.1 ft by 1.7 ft D. 3.5 ft by 3.5 ft by 3.5 ft
Mathematics