Use an analytic method to solve the equation.
+ 
= 4
A. {0}
B. {2, -2}
C. {
, -2}
D. {-2}
Answer: D
Mathematics
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Use DeMorgan's laws or a truth table to determine whether the two statements are equivalent.(q ? p) ? (p ? q), (q ? p)
A. Not equivalent B. Equivalent
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At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.Between 14.3 and 16.1 seconds
A. 34% B. 50% C. 48% D. 68%
Mathematics