Tickets for a school concert were priced at $7 for students and $18 for non-students. There were four times as many student tickets sold as non-student tickets for a total of $6,440. How many tickets in total were sold?

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

41*67/2=1373.5

step-by-step explanation:

i just used a calculator

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a