Which shows the expression factored correctly? 16x^2-25
(8x - 5)(8x + 5)
(8x - 5)(2x - 5)
(4x - 5)(4x + 5)
(8x - 12.5)(8x + 12.5)

Lets take a look at the options first.
option 1 and option 4 are not possible as (8x) (8x) would give us 64x^2, which is not what we want.

we’re left with option 2 & 3. when expanded, option 2 will look like :
16x^2 - 40x - 10x + 25
= 16x^2 - 50x + 25

however, we do not want the 50x. so the answer is option 3, (4x-5) (4x+5)

if you don’t want to find the answer using expanding, there is also another method of expanding.

(a+b)^2 = a^2 - b^2

in this case, 16x^2 will be a^2 and 25 will be b^2. not sure whether you’ve learn this but yea.

Iwould say false, not positive but if prices went up for both stores, technically there will be less buyers?

The answer is 109 times per second