Answer:
10
Step-by-step explanation:
Answer:
Black Friday sales
Step-by-step explanation:
Perimeter is legnth +legnth + width + width or
P=2L+2W
L=2W
subsitute L=2W for L in P=2L+2W
P=2(2W)+2W
P=4W+2W
P=6W
we know that Perimiter=30 so
30=6W
divide both sides by 6
5=Width
subsitute W=5 for W in L=2W
L=2(5)
L=10
to check
10=2(10)+2(5)
30=20+10
30=30
checks
Legnght=10
Width=5
A is the initial population
b is the decay coefficient
X is normally the time.

<span>then is the population half of the initial population of A
for half life you will have
</span>

<span>so the equation becomes
</span>