Provide an appropriate response.The expression xy (is/is not) a term, whereas the expression x + y (is/is not) a term.
A. is, is
B. is, is not
C. is not, is not
D. is not, is
Answer: B
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Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.The median family income in a certain year was $46,676 and there were about 7.2 × 107 families. Calculate the total family income for that year.
A. $336 × 1012 B. $2 × 1012 C. $3.36 × 1012 D. $3.36 × 10-12
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Greater than 16.1 seconds
A. 15.5% B. 16% C. 13.5% D. 2%
Solve the problem.The average height of a boy in the United States, from birth through 60 months, can be modeled by 
where y is the average height, in inches, of boys who are x months of age. What would be the expected difference in height between a child 49 months of age and a child 25 months of age?
A. 5.8 inches B. 20.3 inches C. 46 inches D. 7.8 inches
Is the following statement true or false?7 ? 8 ? 9 + 17
A. True B. False