6 because diameter times pie =area just like radius squared times pie = area. so you simply take 36 and find the square root of it. hope this helps!
For this case we must solve the following quadratic equation:

Where:

The solution is given by:

Substituting:

Thus, we have two roots:

ANswer:

Use compatible numbers to find two estimates that the quotient is between. For example:
1,624 divided by 3
<span> 1500 / 3 = 500 </span>
<span>1800 / 3 = 600</span>
6+3n≤40
Use inverse operations i.e.
4x+2<10
-2 -2
4x<8
4*x/4<8/4
x<2
X= -5/2 (0.4)
or
x= -2 1/2 (2.5)