Solve the problem.An airplane leaves Los Angeles for Denver at a speed of 400 mph. Thirty minutes later, a plane going from Denver to Los Angeles leaves Denver, which is 850 miles from Los Angeles, at a speed of 460 mph. When they meet, how far are they from Denver?
A. 348 mi
B. 289 mi
C. 58 mi
D. 116 mi
Answer: A
Mathematics
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Evaluate the integral.
A. 7 cosh (4x - ln 8) + C
B. 28 cosh (4x - ln 8) + C
C. 
cosh 4x + C
D. 
cosh (4x - ln 8) + C
Mathematics
Find the moment or center of mass of the wire, as indicated.Find the moment about the x-axis of a wire of constant density that lies along the curve y = 2
from 
to 
.
A. 14
B. 
C. 
D. 21
Mathematics
Add or subtract.15
- 8
A. 22
B. 23
C. 6
D. 6
Mathematics
Solve the problem. If the answer is an amount of money, round to the nearest dollar.Brand X copier advertises that its copiers run 19% longer between service calls than its competitor. If Brand X copiers run 55,500 copies between services, how many copies would the competitor run?
A. 30,663 B. 44,955 C. 46,639 D. 66,045
Mathematics