Simplify the expression.

A.

B.

C.

D.

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?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Answer pls man im trying to get out of summer school