we know that
The formula of the surface area of the cone is equal to
where
SA is the surface area
r is the radius of the cone
l is the slant height
in this problem we have
Solve the formula for l
substitute the values
therefore
<u>the answer is</u>
The slant height is 
Printer A prints for 10 minutes, so prints
... (30 pages/minute)×(10 minutes) = 300 pages
Printer B prints for 7 minutes, so prints
... (40 pages/minute)×(7 minutes) = 280 pages
At the end of 10 minutes, the two printers will have printed
... 300 pages + 280 pages = 580 pages
The answer is 14 you just have to substitute x with the given number and finish the equation
4 dollars they contributed 4 dollars each
6(-3)-1-51+131=
-18-1-51+131=
-70+131=61
