Solve the problem.A formula for calculating the distance, d, one can see from an airplane to the horizon on a clear day is 
where x is the altitude of the plane in feet and d is given in miles. How far can one see in a plane flying at 28,000 feet? Round your answer to the nearest tenth mile, if necessary.
A. 17,080 mi
B. 204.1 mi
C. 1708 mi
D. 184.8 mi
Answer: B
Mathematics
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Find an algebraic expression for the given expression.cot(csc-1 2x)
A. 
B. 
C. 
D. 4x2 - 1
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Write the number in scientific notation.63,000,000
A. 6.3 × 10-7 B. 6.3 × 10-6 C. 6.3 × 107 D. 6.3 × 106
Mathematics
A football team had control of the ball for the first nine plays in a game. The chart shows the yards gained or lost in each of those plays. 
What was the net gain or loss considering the first four plays?
A. +12 yards B. +16 yards C. -12 yards D. +10 yards
Mathematics
If DE is a chord in circle O and M is the midpoint of DE, then
(a) OM = OD. (b) OM ? DE. (c) DE = ?MOD. (d) OD ? OE. (e) All of these are correct.
Mathematics