Yes. Speed is distance over time. Since Rachel rode 18.2 miles in 1.4 hours, her speed was 13miles/hour.
10 times as much as 2000 is 1/10 of 200,000. I believe.
The answer is
x^5
is correct......
According to the question requirements
v= 4/3*pi*r^3
dv/dt = 4*pi*r^2*dr/dt
when
d= 1.7
r= 0.85
and
dv/dt = 2
2= 4*pi*(0.85)^2*dr/dtthus the the speed of increasing of the balloon's diameter is
dr/dt = 1/(2pi*(0.85)^2)
=<span>0.2203 ft/min</span>
