English...because english subject is a part of our language worldwide and that can communicate all over the world...its just my opinion
Answer:
Step-by-step explanation:
Given
The given equation is a differential equation
By separating variable
⇒
Now by taking integration both side
⇒
Where C is the constant
from above equation we can say that
When t will increases in positive direction then 
will decreases it means that 
will increases, so y will decreases. Similarly in the case of negative t.
Answer:
2 gigabytes of data
Step-by-step explanation:
Given
Amount Jason keeps per month = $68.90
Cost of flat per month = $60.50
Balance for data = 68.90-60.50
Balance for data = $8.40
If 1Gigabyte = $4
x = $8.40
Cross multiply
4x = 8.40
x = 8.40/2
x = 2.20
Hence Jason can only use 2 gigabytes of data while staying within his budget
