Solve the problem.A circular pond is being installed in the corner of a yard, as shown. The installer needs to know the value of x in feet. Find x to the nearest tenth of a foot. 
?a = 39 ft
A. 1.1 ft
B. 1.8 ft
C. 1.4 ft
D. 2 ft
Answer: C
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Round to the place value indicated.318,831 to the nearest ten-thousand
A. 320,000 B. 310,000 C. 318,000 D. 400,000
Write an equation relating the variables in the situation described.The cost C in dollars of having an electrician come to your house to do a repair job in h hours if he charges $22 for coming to the house and $30 for each hour.
A. C = 22 + 30h B. C = 52h C. C = 30 + 22h D. C = 22 - 30h
Solve the problem.Find an expression that represents the volume of the figure.
A. 12x27y21 B. 36x8y5 C. 12x15y40 D. 12x9y7
Solve the problem.A chemist needs 130 milliliters of a 72% solution but has only 17% and 82% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 100 mL of 17%; 30 mL of 82% B. 20 mL of 17%; 110 mL of 82% C. 110 mL of 17%; 20 mL of 82% D. 30 mL of 17%; 100 mL of 82%