Find the probability.A fair die is rolled. What is the probability of rolling a 3 or a 6?
A. 2
B. 
C. 
D. 
Answer: B
Mathematics
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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:Between 15.2 and 16.1 seconds
A. 50% B. 34% C. 68% D. 13.5%
Mathematics
Write the vector in terms of the unit vectors i and j.v = 
A. 9i - 2j B. 9i - 2 C. (9 + i) - 2j D. 9 - 2j
Mathematics
Solve the problem. Write ratios in simplest form.Bob is 15 years old, and Susan is 20 years old. Find the ratio of his age to hers.
A. 
B. 
C. 
D. 
Mathematics
Decide whether the statement is true or false.The y-intercepts of the ellipse with equation 
+ 
= 1 are 
and 
A. True B. False
Mathematics