Solve.A multiple birth is any birth with 2 or more children born. The birth rate is the number of births per 1000 women. In one country, the birth rate B of multiple births as a function of age a is given by the function 
for 
What is the multiple birth rate of women who are 21 years of age according to the model?
A. 37.17
B. 11.74
C. 22.8
D. 51.54
Answer: C
Mathematics
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Evaluate the integral.
x dx
A. x cos-1x + 
+ C
B. x cos-1x - 
+ C
C. x cos-1x - 
+ C
D. x cos-1x - 2
+ C
Mathematics
Write the improper fraction as a mixed number or a whole number.
A. 6
B. 8
C. 7
D. 7
Mathematics
Solve the problem.The foundation for a cylindrical fountain is a cylinder 12 m in diameter and 5 m high. How many cubic m of concrete are needed to build the foundation? Use 3.14 for ?. Round the answer to the nearest tenth if necessary.
A. 1130.4 m3 B. 565.2 m3 C. 376.8 m3 D. 2260.8 m3
Mathematics
Solve the compound inequality and graph the solution set on a number line. Except for the empty set, express the solution set in interval notation.-2x ? -6 or 4x > 12x - 8 
A. ?
B. (1, 3]
C. (-?, 1) ? [3, ?)
D. (-?, 1] ? (3, ?)
Mathematics