Kiara buys a meal from a food truck costs $12. There is an additional 8.5% tax added to her total. if she pays for the meal with a $20 bill, then which of the following represents the change she is due? here’s another one that i need answered fast.
on average, supermarkets mark up their groceries by 13%. if a grocer buys a bottle of olive oil for $7, how much should she sell it for based on this percentage?
please help. hurry!!!

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Asphere has a diameter of 10 in. what is the volume of the sphere?