Answer the question asked. When necessary, round to the nearest hundredth.Two automobiles going in opposite directions leave at the same time. One automobile travels 10 mph faster than the other. In 4 hours the automobiles are 320 miles apart. Find the speed of each.
A. 45 mph, 55 mph
B. 25 mph, 35 mph
C. 35 mph, 45 mph
D. 15 mph, 70 mph
Answer: C
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Use the given transformation to evaluate the integral. src="https://sciemce.com/media/4/ppg__10612191744__f1q58g7.jpg" alt="" style="vertical-align: -4.0px;" /> 
Rwhere R is the parallelepiped bounded by the planes 
A. 28
B. 56
C. 252
D. 126
Solve.For maximum benefit during exercise, one's heart rate should increase by 50% to 85% above resting heart rate. (a) Alice has a resting heart rate of 70 bpm (beats per minute). What would her heart rate be if she increased it by 80% during exercise? (b) Sahill, who has a resting heart rate of 68 bpm , increased it to 119 bpm. By what percent did he increase his resting heart rate?
A. (a) 126 bpm, (b) 85% B. (a) 116 bpm, (b) 85% C. (a) 116 bpm, (b) 75% D. (a) 126 bpm, (b) 75%
Use the cofunction identities to find an angle ? that makes the statement true.sin (? + 4°) = cos (? + 6°)
A. ? = 
B. ? = 10°
C. ? = 40°
D. ? = 
Determine whether the graph of the polynomial has y-axis symmetry, origin symmetry, or neither.f(x) = 4 - x4
A. origin symmetry B. y-axis symmetry C. neither