Tc has a half-life of 6.05 hours. If the activity of a container of 99 Tc decreased to 32% of its 43 43 initial value, how old is the container of

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.