Solve the equation.1 - 
= 
A. 2
B. -2
C. - 
D. 
Answer: B
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Write the equation of the ellipse that has its center at the origin, focus at 
, and major axis equal to 18.
?
A. 
B. 
C. 
D. 
E. 
Systolic blood pressure for a group of women is normally distributed, with a mean of 130 and a standard deviation of 10. Find the probability that a woman selected at random has blood pressure greater than 155. Round your answer to four decimal places.
a. 0.4938 b. 0.9938 c. 0.0062 d. 0.5062 e. 0.9876
Find the volume. Use ? ? 3.14. Round to the nearest tenth when necessary.a sphere with radius 12 m
A. 904.3 m3 B. 4069.4 m3 C. 602.9 m3 D. 7234.6 m3
Solve.Your bank pays an interest rate r compounded semiannually on all account balances. If you wanted the balance in an account to be $2000 at the end of one year, you would need to have a current balance of 
dollars. Simplify this expression.
A. 
dollars
B. 
dollars
C. 
dollars
D. 
dollars