Answer:
a) b²
b) 4
Explanation:
a) (axa)=a²
(a-b)(a+b) = a²-b²
So it's a²-(a²-b²) = b²
b)
Let a be 6730
(axa) - (a-2)(a+2)
since b =2 and a²-(a²-b²) = b²,
(6730x6730) - 6728 x 6732 = 2² = 4
<span>Taking the age of the earth to be about 4 * 10^9 years and assuming the radius of its orbit has not changed and is circular, calculate the approximate total distance the earth has traveled since its birth (in a frame of reference stationary with respect to the sun)</span>
Since you don't provide picture, find the spot that is located on the west part of the Mali, On top of the River Niger and below the Sahara desert
By the Romans when they conquered them
Central America and Mexico remain part of the spanish colonies ,both have rich soil and these region has become a center of coffee production