It is 10.7703296143, but estimated it would be about 11. Hope I helped!! :)
Answer:
670
Step-by-step explanation:
(3*1+2)+(3*2+2)+........(3*20+2)=670
The next number would be 8+13 = 21
3e^2 + 5e = e(3e +5)
............................
First simplify this inequality:

Now you can graph this inequality. Draw the vertical dashed line x=3 and shade the region to the right from this line. This is exactly the region that represents the solution of inequality (see attached diagram for details).