few integration questions that are bugging me i have made attempt on all of them some of them are not even worth mentioning how i have tried it because it got me no where near the answer.

1. i am not even sure how to begin this one.

answer =84

attempt:

or other path i have tried as well... but wasn't sure how to exactly fully proceed

so i have tried this then...

2. this one i am not sure if i copied wrong or something but when i attempt it i get the answer of 1

question:

answer =0.73

attempt:

3. this one gives me some problems as well. question says

find the equation that passes thru (1,0) is tangent to the line and has

answer:

4. last question says

find first quadrant area of

answer:

attempt:

first rewrite the equation to be

got the limits using table of values and got result of (2,1)

and then i am not sure if i am on the right path because it does not work out to correct answer.