Find an equation for the ellipse described.Center at (0, 0); focus at (-3, 0); vertex at (8, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
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Solve. Round your results to four decimal places.Use the Euler method with dx = 0.2 to estimate y(3) if y' = -y/x and y(2) = 2. What is the exact value of 
A. y ? 1.1579, exact value is 2.0000 B. y ? 1.2857, exact value is 1.0000 C. y ? 0.7368, exact value is 4.0000 D. y ? 0.5263, exact value is 3.0000
As part of a study, 800 college football players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 235 pounds and the standard deviation is 25 pounds.Of the 800 players approximately how many weighed 210 pounds or less?
A. 128 B. 200 C. 64 D. 544 E. none of these
Write the complex number in rectangular form.8
A. 
+ 
i
B. 
+ 
i
C. 4
+ 4i
D. 4 + 4
i
Solve the problem.Ron and Kathy are ticket-sellers at their class play. Ron is selling student tickets for $1.00 each, and Kathy selling adult tickets for $5.50 each. If their total income for 16 tickets was $47.50, how many tickets did Ron sell?
A. 9 tickets B. 11 tickets C. 12 tickets D. 7 tickets