Ineed on this question what number represents the same amount as 6 hundreds+ 6 tens+ 14 ones?

On a piece of paper graph f(x)=5•(0.4)^x

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.