The half-life or radium is 517 years. After 4,653 years there is only 7g left. Find how many grams there were at the beginning.

3,590 g

Step-by-step explanation:

Using the formula:

where

remainder after a given time , that is

Original number of radium

, where is the half life , therefore :

= 0.001341

substituting all into the formula , we have :

dividing through by 0.001950

g

Therefore , there are approximately 3,590g of radium at the beginning

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

given hc ∥ gd.¯¯¯¯¯¯which statement is true

step-by-step explanation:

∠cbe and ∠deb are same-side interior angles