1. Professor Curie is using the radioactive isotope Francium-223 in her research. This Isotope has a half-life of 22 minutes, which means that every 22 minutes the sample has half the radioactivity it did in the previous interval. If Professor Curle has 15 grams of Francium-223, which explicit formula describes how the isotope decays?
O = 22(0.5) -
O = 15(22)"-1
O=15(0.5)-1
O = 22(0-5)-2

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.

do your own work and don"t cheat.

step-by-step explanation: