Write the number as the product of prime factors.651
A. 21 ? 31
B. 3 ? 3 ? 31
C. 3 ? 7 ? 31
D. 7 ? 7 ? 31
Answer: C
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Choose the closest estimate.Which is the closest to the length of a pencil?
A. 15 mm B. 15 cm C. 15 m D. 15 km
Solve.What is the weight of a concrete wall that is 25 feet long, 5 feet high, and 8 inches thick? Assume concrete weighs 150 pounds per cubic foot. Round to the nearest pound.
Fill in the blank(s) with the appropriate word(s).
Provide an appropriate response. If you know the total length of a fence and the width of each board used to build the fence, what operation would you use to determine the number of boards needed for the fence?
A. subtraction B. addition C. division D. multiplication
Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.
-2
A. 
B. 
C. 
D. 