Convert as indicated.In a physics lab, Shelly recorded the speed of an object at 80 feet per second. Convert this speed to miles per hour. (Round to the nearest whole, if necessary.)
A. 
mph
B. 288,000 mph
C. 1 mph
D. 55 mph
Answer: D
Mathematics
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Evaluate the expression for x = -2, y = 3, and a = -4.x3 - 7y + 3a
A. -37 B. -41 C. -25 D. -28
Mathematics
Add or subtract as indicated. Write the answer in simplest form.
+ 
A. 
B. 
C. 
D. 
Mathematics
The foci F1 and F2, the vertices V1 and V2, and the endpoints U1 and U2 of the minor axis are as labeled in the figure. Graph the ellipse and find its standard equation. (The coordinates of V1, V2, U1, and U2 are integers, and the coordinates of F1 and F2 are given.)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places. log8.65.9
A. 0.686 B. 1.212 C. 0.771 D. 0.825
Mathematics