Answer: a) $45.75
b) $179.25
c) 7 days
Explanation:
![Milk: (1)/(2)\ gallon*7\ batches = 3(1)/(2)\ gallons\qquad \text{(round up to 4 gallons)}\\\\Butter: 2\ cubes* 7\ batches=14\ cubes\qquad \text{(round up to 16 cubes)}\\\\Sugar: 1\ bag* 7\ batches=7\ bags\\\\Chocolate: 3\ squares* 7\ batches=21\ squares\\\\\\Milk: \$3.60*4=\$14.40\\Butter: \$2.25*4=\$10.00\\Sugar: \$1.07*7=\$7.49\\Chocolate: \$0.66* 21=\$13.86\\.\qquad \qquad \qquad TOTAL=\large\boxed{\$45.75}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/knmt9qwmscwxn0kbioy19vowvmokztfj4a.png)
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![Milk: (1)/(2)\ gallon*30\ batches = 15\ gallons\\\\Butter: 2\ cubes* 30\ batches=60\ cubes\\\\Sugar: 1\ bag* 30\ batches=30\ bags\\\\Chocolate: 3\ squares* 30\ batches=90\ squares\\\\\\Milk: \$3.60*15=\$54.00\\Butter: \$2.25*15=\$33.75\\Sugar: \$1.07*30=\$32.10\\Chocolate: \$0.66* 90=\$59.40\\.\qquad \qquad \qquad TOTAL=\large\boxed{\$179.25}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q15pp62ahi1ihhu3g9quo56gran15v6xj7.png)
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30 days - 7 days
$179.25 - $45.75 = $133.50
Note: follow the same pattern as above for 6 days which equals $33.60
$179.25 - $33.60 = $145.65 which is not under $140