When wiring a house, an electrician knows that the time she by the Time = 2 hours + 12 minutes per lightswitch She charges her customers a call-out fee of £35, plus £30 per hour. How much should a customer be charged for wiring a house with 10 lightswitches?

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70 years.

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the answer is d

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you can also use mathway to get you answer + steps

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)