Solve the problem.An airplane flies from Metro City to Gotham with a tailwind that increases its normal speed by 
On the return trip, the plane must fly against this wind, which decreases its normal speed by the same amount. The flight from Metro City takes 2.70 hours and the return trip takes 
How far is it from Metro City to Gotham?
A. 1120 mi
B. 1000 mi
C. 1200 mi
D. 1300 mi
Answer: B
Mathematics
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Solve the problem.Find the range and the standard deviation of the following voltages (in volts) of a sample of watch batteries: 1.212, 1.199, 1.201, 1.202, 1.199, 1.198.
A. Range = 0.014 V; standard deviation = 0.0040 V B. Range = 0.013 V; standard deviation = 0.0039 V C. Range = 0.013 V; standard deviation = 0.0040 V D. Range = 0.014 V; standard deviation = 0.0052 V
Mathematics
Perform the addition. 
A. 267 B. 209 C. 205 D. 195
Mathematics
Complete.673.1 mg = 
mcg
A. 6.731 B. 67,310 C. 0.6731 D. 673,100
Mathematics
Convert the radian measure to degree measure. Use the value of ? found on a calculator and round answers to two decimal places.-?/3
A. -1.05° B. -60?° C. -(?/3)° D. -60°
Mathematics