Question

A printer printed 68 letters in 4 seconds. If it prints letters at a constant speed, it can print ______ letters in 30 seconds.

Answer 1

First you do, 68/4 to give you the amount of letters it can print in 1 second. This is 17.
Then you do 17*30= 510.

I think this is it...

Answer 2

proportion time...
68/4 = x/30 --- 68 letters in 4 sec = x letters in 30 sec
cross multiply
4x = (68)(30)
4x = 2040 -- divide both sides by 4
x = 510

510 letters in 30 sec

Answer 3

Oh yes I was righttttttttt ^-^ Hehehe