The fourth option is correct.
See the attached image. The red cylinder represents a washer formed by the described revolution. Its volume is

so when we integrate, we take

Irrational
Irrational
Rational
Rational
Irrational
Rational
Irrational
Irrational
Sorry if anything is wrong, I went off of memory! :)
I think the answer is d. The slope of AC=Slope of DF.
Hope this helped☺☺
Answer:
7x ≥ 70
Step-by-step explanation:
5x + 2x ≥ 70
7x ≥ 70
x ≥ 10
Hope this helps!
-sruthi123