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please help

Cassie is traveling 675 miles today to visit her brother and his family. So far, she has stopped for gas three times. At the first stop, she put in 7.1 gallons of gas and paid $23.79. At her second stop, she put in 5.8 gallons of gas and paid $19.08. And, at the third stop, 6.6 gallons and paid $20.39.

1. At which stop did Cassie pay the least per gallon of gas?
first stop
second stop
third stop

2. If the gas station that Cassie stopped at first raises their price 8%, what will be their new price per gallon?

3. If the gas station that Cassie stopped at last lowers their price 6%, what will be their new price per gallon?

Respuesta :

for part 2) and 3)

to get the percent of any amount, simply [tex]\bf {{ a}}\%\ of\ b \implies \cfrac{{{ a}}}{100}\cdot b\implies {{ a}}\div 100\cdot b\\\\ -----------------------------\\\\ thus\ say\implies {{ 8}}\%\ of\ 23.79 \implies \cfrac{{{ 8}}}{100}\cdot 23.79\implies {{ 8}}\div 100\cdot 23.79 \\\\ or\implies {{ 6}}\%\ of\ 23.79 \implies \cfrac{{{ 6}}}{100}\cdot 23.79\implies {{ 6}}\div 100\cdot 23.79[/tex]

so... get that percentage amount, and for part 2), add it to the 23.79
then recalculate the money per gallon by doing the division

and for part 3), get the 6% amount and subtract it from 20.39,
then recalculate the money per gallon by doing the division

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