Answer:
1. J because it's a straight line
2. 225
however I only got 4 marks not 5.
Step-by-step explanation:
It should be option A! I hope this helps you!
Answer:
2.86310
Step-by-step explanation:
It is small but is larger than two
So, first, what are the two sides?
let's call then x and y
we know that 2(x+y)=12.5 (that's the distance around)
so that means that x+y=6.25 (I just divided both by 2)
now, x=4y (from "4 times as long as it is wide")
so we can substitute:
x+4x=6.25
5x=6.25
x=1.25
so one side, is 1.25 and the other will be 1.25*4=5
and for the area we multiply the two:
1.25*5=6.25 square kilometers, and this is the answer!
To find the answer, use 
, and then use the equation 
To find it's half life.
