Solve the problem.An airplane is cruising at an altitude of 42,240 ft. What is the plane's altitude in miles?
A. 9 mi
B. 7 mi
C. 16 mi
D. 8 mi
Answer: D
Mathematics
You might also like to view...
Add or subtract as indicated. Simplify the result if possible. If an answer is an improper fraction, write it as a mixed number.
- 
A. 
B. 
C. 
D. 
Mathematics
Solve.The formula Z = R sec ? gives the impedance Z (in ohms) in an ac circuit with resistance R (in ohms) and phase angle ? (in radians). Find the average value of Z for an 88.9-? resistor as ? ranges from ?/8 radians to ?/3 radians.
A. 154.9 ? B. 124.1 ? C. 162.3 ? D. 81.2 ?
Mathematics
Add. Simplify the result whenever possible. 
k + 
k
A. 
k
B. 
k2
C. k
D. 1
Mathematics
Find the equation for the tangent to the curve at the given point.f(x) = 3x2 + 5x - 7; (-2, -5)
A. y = -7x - 19
B. y = 
x - 
C. y = 
x + 1
D. y = -7x + 28
Mathematics