Solve the problem.An elliptical riding path is to be built on a rectangular piece of property that measures 10 mi by 8 mi. Find an equation for the ellipse if the path is to touch the center of the property line on all 4 sides
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
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Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when 
A. 20 ft2/ft B. 20? ft2/ft C. 100? ft2/ft D. 10? ft2/ft
Find the limit, if it exists. 
Solve the problem.The matrices give points and rebounds for five players in two games. Find the matrix that gives the averages.
A. 
B. 
C. 
D. 
Use the appropriate normal distribution to approximate the resulting binomial distribution.
Colorado Mining and Mineral has 800 employees engaged in its mining operations. It has been estimated that the probability of a worker meeting with an accident during a 1-year period is .1. What is the probability that more than 80 workers will meet with an accident during the 1-year period? a. The probability is 0.4669. b. The probability is 0.4684. c. The probability is 0.4761. d. The probability is 0.8491