Solve the problem.A bicycle wheel rotates 500 times in a minute as long as the rider is pedalling. If the rider stops pedalling, the wheel starts to slow down. Each minute it will rotate only 4/5 as many times as in the preceding minute. How many times will the wheel rotate in the 4th minute after the rider's feet leave the pedals? Round your answer to the nearest unit.
A. 0 times
B. 211 times
C. 158 times
D. 8 times
Answer: C
Mathematics
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Solve the problem.A tree 14 feet high grows at the rate of 2 feet each year. How many years will it take for the tree to grow to a height of 30 feet?
A. 14 years B. 8 years C. 13 years D. 29 year(s)
Mathematics
Find ? for 0° ? ? < 360° that satisfies the stated conditions. Round your answer to the nearest hundredth.cos ? = -0.85, tan ? < 0
A. 256.79° B. 148.21° C. 238.21° D. 211.79°
Mathematics
Use the formula for 
to evaluate the expression.
A. 2 B. 2520 C. 5040 D. 1
Mathematics
Find the angle between the given vectors, to the nearest tenth of a degree.t = 
, s = 
A. 47.7° B. -70.3° C. 160.3° D. 19.7°
Mathematics