Answer:
0.70p
Step-by-step explanation:
"30% off" means paying only 70% of the original sales price (subtracting 30% from 100% yields 70%). Next, find the decimal equivalent of 70%:
It is 0.70. Finally, multiply the price p by 0.70: 0.70p (Answer b)
42
it is proportional because there is a roc of +5 bc as one hour increases 5 dollars is added to the initial cost
500-30c=m
