Multiply using the rule for finding the product of the sum and difference of two terms.(11x + 9)(11x - 9)
A. 121x2 + 198x - 81
B. 121x2 - 81
C. x2 - 81
D. 121x2 - 198x - 81
Answer: B
Mathematics
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A. 3ab
B. 3
C. -3a2b
D. 3ab
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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:At least 14.3 seconds
A. 84% B. 50% C. 13.5% D. 16%
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Find the volume of the solid. Use 
for ?.
A. 268
cu m
B. 16
cu m
C. 
cu m
D. 33
cu m
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Use a calculator to approximate the natural logarithm to four decimal places.ln 0.995
A. -0.0022 B. 0.0022 C. 0.0050 D. -0.0050
Mathematics