A radioactive substance decays according to the equation y=30( .88 )^x, where y is measured in grams of the radioactive substance and x is years. In how many years will there be about half of the original amount left of this radioactive substance?

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by