Final answer:
The 12 oz bottle of cleaner, with a cost per ounce of $0.3117, is a better buy than the 16 oz bottle, which has a higher cost per ounce of $0.3338. To estimate the cost for different sizes, you multiply the given or the calculated cost per ounce by the new size in ounces.
Step-by-step explanation:
To determine which bottle of cleaner would be the best buy, you need to calculate the cost per ounce for each bottle. To do this for the first bottle, divide the cost by the number of ounces: $3.74 ÷ 12 oz = $0.3117 per ounce. For the second bottle, the calculation is $5.34 ÷ 16 oz = $0.3338 per ounce. This analysis shows that the 12 oz bottle has a lower cost per ounce and is therefore a better buy.
Regarding the estimated cost for different sizes, you would similarly calculate the cost per ounce from the given data and extrapolate to estimate the total cost for the 40 oz and 90 oz sizes. For example, if you are given the cost per ounce for a certain size, multiply that by the number of ounces to estimate the total cost. However, if there are volume discounts or nonlinear pricing patterns, this approach might not accurately predict the cost.