728 km per hour
3640 divided by 5 to find the unit rate for kilometers per hour
2+5 = 7 is <span>the related addition sentence that shows the commutative property of addition because it has the same result of addition as 5+2=7.
Commu</span><span>tative property of addition says that if we have two numbers we have interchange them and this doesnot affect the result....</span>
Answer: (b)
Step-by-step explanation:
Given
R is inversely proportional to A i.e
![R\propto \dfrac{1}{A}\\\\R=\dfrac{C}{A}\quad [\text{C=Constant}]](https://tex.z-dn.net/?f=R%5Cpropto%20%5Cdfrac%7B1%7D%7BA%7D%5C%5C%5C%5CR%3D%5Cdfrac%7BC%7D%7BA%7D%5Cquad%20%5B%5Ctext%7BC%3DConstant%7D%5D)
when 
Insert the values to get C

When A=250

option (b) is correct
In order to find the maximum of the function, we have to find the roots of the first derivative.

This gives us the time at which the ball reaches its maximum height.
We don't know s. We can find it because we know that at t=0 the ball is on the ground and its height has to be zero.

Finally, we can find the maximum height:

The answer is
C.