Find the equation in standard form of an ellipse centered at the origin that passes through the given points.(-
, 0), (
, 0), (0, -4
), and (0, 4
)
A. 
+ 
= 1
B. 
+ 
= 1
C. 2x2 + 32y2 = 1
D. 
+ 
= 1
Answer: B
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. x + y + z = 5 B. x + y + z = 1 C. -7x - 7y + 9z = 5 D. -7x - 7y + 9z = 1
The time required to double the amount of an investment at an interest rate r compounded continuously is given by  figure 1.png)
. Find the time required to double an investment at 4%, 5%, and 6%.
What will be an ideal response?
Solve. Round to two decimal places unless otherwise noted.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by 
What is the cost per ton for 
A. $378.79 B. $1562.50 C. $1437.50 D. $12.50
Solve the equation for ? if 
. Give your answer in degrees.
?
What will be an ideal response?