The square root of 81/100
equals...
9/10
Good Luck! :)
(5x-7)2 + 140x
= 25x2 - 70x + 14 + 140x
= 25x2 + 70x + 14
= (5x+7)2
The cross-section of a sphere is a circle . The area of a circle can be calculated by the formula A=
Where r is the radius of the circle.
Given :
Solving for r we have:

Or r= 10.
The area of a sphere is calculated by the formula :

Substituting r value we have:
SA= 
The total surface area of this sphere is 400π .
Answer:
630-420=210
Step-by-step explanation:
630 is miles to go and 420 is miles travel
.°. 630-420=210
The correct answer is 157