Answer:
.
Step-by-step explanation:
Using first order linear differential equation:


finding integrating factor:
I.F = 
I.F =
now,



hence the solution is

Answer:
40--C A ---is not[figure it out in your own words,your teacher might suspect something] and B---times 40
Step-by-step explanation:
b--40+40=80 80+40=120 and 120+40=160 A=subtract 40 from all the other answers such as 40-160=120 40-120=80 and 40-80=40
Answer:
105km
Step-by-step explanation:
1/7=15/x
So x=7*15
x=105
Answer:
2.5:1 or 2.5
Step-by-step explanation:
5/2 ÷ 2 would give you 2.5/1 or 2.5