Use the formula below.
Let A_0 = 1 because you just want to know the percentage left. Usually that's the initial amount.
t = 15, the number of years past. n = 22, the half-life.
Hey use the symbolab it can work with these type of equations xoxo
90 minutes because 20 + 20 + 20 + 20 + 10 = 90
Answer:
its 40
Step-by-step explanation: 65+75= 140 180-140=40
give brainliest plz lol
There's no "why" because it isn't.
The greatest common factor of two numbers
is only even when the two numbers are even.
==> The greatest common factor of '14' and '21' is ' 7 ' .