Answer:
hh
Step-by-step explanation:
The half-life of the element is 13 minutes, which means after 13 minutes, any starting amount decays to half. So element X decays with a rate k such that
Solve for k :
Now, we solve for t such that
To find the area we must do the length times the width. But we already have the width and the area, so to find the length we must do the area divided by the width. 6375/85=75
the answer is circle in blue
7:10
A=2/5
B=4/7
Find a like denominator
Numerators=ratio
14:20
Simplify
7:10