At the market 8 apples cost $4 how much do 9 apples cost ?

Answer:$4.5.Step-by-step explanation:We have been given that at the market 8 apples cost $4.Let us find the cost of 1 apple by dividing total cost of apples by total number of apples.[tex]\text{Cost of 1 apple}=\frac{\$4}{8}[/tex][tex]\text{Cost of 1 apple}=\$0.5[/tex]To find the cost of 9 apples we will multiply cost of 1 apple by 9.[tex]\text{Cost of 9 apples}=\$0.5\times 9[/tex][tex]\text{Cost of 9 apples}=\$4.5[/tex]Therefore, the cost of 9 apples will be $4.5.