Lin’s father is paying $20 for a meal. He has a 15%-off coupon for the meal. After the discount, a 7% sales tax is applied. What is the amount of the sales tax for this meal?

answer: -0.5 would be the most likley outcome

step-by-step explanation:

step-by-step explanation:

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the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.