Solve the problem.An airplane flies 400 miles with the wind and 320 against the wind in the same length of time. If the speed of the wind is 40, what is the speed of the airplane in still air?
A. 350 mph
B. 160 mph
C. 360 mph
D. 365 mph
Answer: C
Mathematics
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A. 
?
B. 4?
C. 
?
D. 16?
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How many terms of the series  Figure 3.png)
would you need to add to find its sum to within 0.02?
What will be an ideal response?
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Multiply and write the answer in scientific notation.(2 × 107)(9 × 106)
A. 1.8 × 1013 B. 18 × 1042 C. 1.8 × 1014 D. 18 × 1014
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Use the given information to find the exact value of the expression.tan ? = 
, ? lies in quadrant III, and cos ? = - 
, ? lies in quadrant II
Find sin (? + ?).
A. 
B. 
C. 
D. 
Mathematics