A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.
a. ? 476 mi/h
b. ? 670 mi/h
c. ? 455 mi/h
d. ? 570 mi/h
e. ? 495 mi/h
a. ? 476 mi/h
Mathematics
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A. 4
B. 
C. 2?
D. -4?
Mathematics
Use a half-angle formula to find the exact value of the expression.sin 
A. 
B. 
C. - 
D. - 
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In the strip of rectangles shown, a certain rigid motion applied to the leftmost rectangle takes the figure to the next rectangle. Apply the same motion, but to the second rectangle, to draw the image of the second rectangle in the third rectangle. Continue to use the same motion to fill in the successive rectangles.
A. 
B. 
C. 
D. 
Mathematics