As part of a study on the metabolism of athletes, 400 college basketball players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 215 pounds and the standard deviation is 15 pounds.Assuming there were no outliers, the range of weights was approximately
A. 180 pounds.
B. 400 pounds.
C. 60 pounds.
D. 90 pounds.
E. none of these
Answer: D
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Divide.12.8x8 ÷ 0.5x4
A. 51.2x4 B. 25.6x5 C. 25.6x12 D. 25.6x4
In real estate, a house's selling price P is found by adding the real estate agent's commission C to the amount A that the seller of the house receives: 
Rachel's house sold for $360,000. Her real estate agent received a commission of $25,200. How much did Rachel receive?
A. $334,800 B. $385,200 C. $334,700 D. $334,900
Name the property illustrated by the statement.7(x + 4) = 7x + 7 ? 4
A. Associative Property of Multiplication B. Identity Property of Multiplication C. Commutative Property of Addition D. Distributive Property
Select the right expression for the following sum and prove that your statement is true for all natural numbers n.
?
?
A. ?
B. ?
C. ?
D. ?
E. none of the above