Provide the proper response.It can be shown that an ellipse with foci (c, 0) and (-c, 0) where the sum of the distances from any point 
of the ellipse to the two foci is 2a has equation 
+ 
= 1. Use this result to find an equation of an ellipse with foci (3, 0) and (-3, 0), where the sum of the distances from any point of the ellipse to the two foci is 8.
A. 
+ 
= 1
B. 
+ 
= 1
C. x2 + y2 = 64
D. 
+ 
= 1
Answer: D
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Use an equation to solve the percent problem.What percent of 115 is 64.4?
A. 56% B. 560% C. 5.6% D. 0.56%
Solve.x2 - 6x - 40 = 0
A. -36, -4
B. -10, 4
C. 
, - 
D. 10, -4
Decompose into partial fractions.
A. 2x - 9 + 
- 
B. 2x - 9 - 
+ 
C. 2x + 9 - 
+ 
D. 2x + 5 - 
+ 
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400