At one high school, students can run the 100-yard dash in an average of 15.2 seconds 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 16.1 and 17 seconds
A. 12%
B. 13.5%
C. 27%
D. 34%
Answer: B
Mathematics
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Identify the type of surface represented by the given equation.
- 
= 
A. Paraboloid
B. Parabolic cylinder
C.
| Ellipsoid |
D. Hyperbolic paraboloid
Mathematics
Solve the problem.For what value of r does the infinite series 1 + 9r + r2 + 9r3 + r4 + 9r5 + r6 + ... converge?
A. |r| < 
B. |r| < 1
C. |r| < 
D. |r| < 9
Mathematics
Provide an appropriate response.A painter can paint 5 standard office rooms in 4 hours. How many can he paint in 20 hours?
A. 25 rooms
B. 6
rooms
C. 16 rooms
D. 1 room
Mathematics
Fill in the blank with one of the words or phrases listed below.
In a mathematical statement, 
usually means "multiplication."
A. amount B. percent C. of D. is
Mathematics