Factor the expression.

4r^2 – 64

1)(4r + 5)(r – 16)
2)4(r – 4)(r – 4)
3)(4r – 5)(r + 16)
4)4(r + 4)(r – 4)

The hypotenuse of an isosceles right triangle is $14\sqrt 2$. what is the area of the triangle?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

15 points what is the end behavior of this graph? & what is the asymptote of this graph?