At a grocery store, a bag of 12 red apples costs $10.80 and a bag of 6 green apples costs 6.90

(I am assuming the question is asking which is a cheaper/better deal.)

Red apples are cheaper per apple

Step-by-step explanation:

solve using unit price formula (price/number of apples)

Red apples =  $10.80/12

= $0.90/ apple

Green apples = $6.90/6

= $1.15/ apple

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720