Let `C` be the curve ` y = 7 sqrt( x ) ` for `2.4 le x le 3.5`.
Graphing window shows horizontal axis: 2 to 4, vertical axis: 0 to 14. Dot at (2.4,10.844353369381), color blue. Dot at (3.5,13.095800853709), color blue. Start Graph, Color black

x	y
2	9.899
2.2	10.383
2.4	10.844
2.6	11.287
2.8	11.713
3	12.124
3.2	12.522
3.4	12.907
3.6	13.282
3.8	13.646
4	14

Find the surface area of revolution about the `x`-axis of `C`.

Surface area `= int_2.4^3.5 f( x ) \ dx` where
`f( x ) =`  
Now integrate to find surface area `= int_2.4^3.5 f( x ) \ dx =`