Solve the problem.An airplane flies on a compass heading of 90.0° at 210 mph. The wind affecting the plane is blowing from 287° at 47.0 mph. What is the true course and ground speed of the airplane? Round results to an appropriate number of significant digits.
A. 94°, 224 mph
B. 79°, 228 mph
C. 93°, 255 mph
D. 80°, 259 mph
Answer: C
Mathematics
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Perform the indicated arithmetic.47
- 16
A. 31
B. 30
C. 30
D. 31
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Solve the problem.If an object is propelled upward from a height of 144 feet at an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 11 sec B. 8 sec C. 4.5 sec D. 9 sec
Mathematics
Approximate the circumference of the circle using 3.14 for ?.
A. 62.8 m B. 125.6 m C. 64.8 m D. 129.6 m
Mathematics
Remove parentheses and simplify the expression.7(y + 10) - 4
A. 7y + 66 B. 7y + 42 C. 17y - 4 D. 7y + 6
Mathematics