Given f(x)=6(1-x), what is the value of: a) f(-8)_

b) f(x) = -30 _

c) f(x) = 30_

d) f(30)_

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?

Ineed i been stuck on this question since yesterday

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°