2/5 is now 10/25 now add 10/25+11/25=21/25
Let g(t) denote the inner integral. By the fundamental theorem of calculus, the first derivative is

Then using the FTC again, differentiating g gives

The Answer is C. Hopefully this will help you out.
Answer:
x ≤ 7/2
Step-by-step explanation:
Expand brackets: 3x - 15 ≤ x - 8
Subtract x from both sides: 2x - 15 ≤ -8
Add 15 to both sides: 2x ≤ 7
Divide both sides by 2: x ≤ 7/2