#1:(A)
#2:(E)
#3:(C)
Hope it helps!
(2.5)^2 + (16.5)^2 = c^2
c = sqrt(2.5^2 + 16.5^2)
c = sqrt(278.5)
c = 16.69
Rounded up it would be 17, so the answer is D.
Yes this is so because 2is composite, but it is a multiple of 4,6,8,10...
The answer B is correct, as this is the floor function. The floor function takes the greatest integer below the number, so that's why B is correct.
This is not factorable. It can be easily tested using the radicand expression of the quadratic equation. (Perfect square= Factorable, No Perfect= Not Factorable.)
