Question

pierre is an electrician she use this formula to work out the amount $c to charge for a job that takes t hours C=20+30t she starts a job at 9.30am and finishes 1pm work out the charges for this job

Answer 1

To work out the charges for the job, we first need to calculate how many hours Pierre worked on the job.

She started at 9:30 am and finished at 1:00 pm, which means she worked for:

1:00 pm - 9:30 am = 3.5 hours

Now, we can use the formula C=20+30t, where t is the number of hours worked (in this case, 3.5) to calculate the charges for the job:

C = 20 + 30(3.5)

C = 20 + 105

C = 125

Therefore, Pierre should charge $125 for the job.