The parabola y=-2x^2 + 8x - c has its vertex at (2,5). What is the value of c
select one:
A.0
B.3
C.6
D.9

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?

Arecipe calls for 32 fluid ounces of heavy cream.how many 1 pint containers of heavy cream are needed to make the recipe?

Indicate the formula for the following conditions: p^c(n,r)=