Question

Sam started a dog-walking business. He charges $5 for each dog for a thirty-minute walk. How much dor

Answer 1

Answer: $\ 10,\ \ 5$

Step-by-step explanation:

(a) Given

Sam charge $5 for each dog for a thirty minute walk

For an hour which is double the thirty minutes, it must be double of the same charge.

$\Rightarrow 2\times 5=\ 10$

(b)Given

With $20, Christie sells 100 cups of lemonade with a quarter per cup charge

For 100 cup, she generate a revenue of

$\Rightarrow \dfrac{1}{4}\times 100\\\\\Rightarrow \ 25$

So, she earns $25-20=\ 5$ that is , her profit is $\ 5$