First find her rate per hour by dividing $90 by 5 hours:
90 / 5 = 18
She makes $18 in one hour.
1 hour = 3600 seconds.
Divide her hourly rate by 3600 to find how much she makes per second:
18 / 3600 = $0.005 per second.
Now divide $0.25 by 0.005 to find the number of seconds needed:
0.25 / 0.005 = 50
It takes 50 seconds.
Answer: 50 seconds
Step-by-step explanation:
We need to convert 5hours to seconds.
5hours = 5 ×60×60 = 18000sec.
$90 = 18000 sec
$0.25 = x
x = 18000× 0.25 / 90
x =4500/90
x = 50
Therefore it takes 50 seconds to earn $0.25
