?An airplane flying at an altitude of 4 miles passes directly over a radar antenna. When the airplane is 25 miles away 
, the radar detects that the distance s is changing at a rate of 220 miles per hour. What is the speed of the airplane? Round your answer to the nearest integer.
?
A. ?223 mi/hr
B. ??206 mi/hr
C. ?446? mi/hr
D. ??111 mi/hr
E. ??103 mi/hr
Answer: A
Mathematics
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Solve.At a local university, students pay tuition of $629 per credit hour. Estimate the tuition cost of 89 credit hours by first rounding each value to the nearest ten.
A. $56,700 B. $55,981 C. $720 D. $55,980
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Find the value of the expression.
? 
A. 
B. 
C. 
D. 
Mathematics
Simplify 
and write the answer in standard form.
a. 47 + 95i b. 47 + 35i c. 53 + 35i d. 103 + 25i e. 103 + 35i
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Solve the equation and check your solution.-5.1 = -9.7 + x
A. 4.6 B. -4.6 C. 0.53 D. -14.8
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