Answer:
5 + 2 x 9
Step 1 = 7 x 9
Step 2 = 63
Step-by-step explanation:
= 5 + 2 x 9
= 5 + ( 2 x 9 )
= 5 + 18
= 23
Step 2 = 7 x 9
= 63
Step 3 = 63
C. jin did not make a mistake
<em>Sorry </em><em>i'm </em><em>wrong </em><em>:</em><em>)</em>
It would be 26 cents per shell
20% * 300 = 2 * (10% * 300) = 2*30 = 60
t=100
p=3000
t 1/2 = 20
Try inserting the numbers in the half-life formula.
4(5x-20)=-20
20x-80=-20
20x=60
x=3