Chapter 0.1, Problem 4E

(a)

To determine

To find: The number of cups more sell of the month January then in April.

Answer to Problem 4E

  ${10}^7\text{ picoliters}$

Explanation of Solution

Given: The sale of Café Mocha’s Coffee of the month are shown in table.

  $\begin{array}{cc}\text{Month}& \text{Number of cups Sold}\\ \text{January}& 850\\ \text{Febuary}& 765\\ \text{March}& 587\\ \text{April}& 500\\ \text{May}& 387\end{array}$

Number of cups sold in January = 850

Number of cups sold in April = 500

Now, calculate difference of both numbers.

  $\begin{array}{l}=850-500\\ =350\end{array}$

Hence, 350 more cups sold in January than in April.

(b)

To determine

To find: The money earn in month of March.

Answer to Problem 4E

  $\$1162.26$

Explanation of Solution

Given: The sale of Café Mocha’s Coffee of the month are shown in table.

  $\begin{array}{cc}\text{Month}& \text{Number of cups Sold}\\ \text{January}& 850\\ \text{Febuary}& 765\\ \text{March}& 587\\ \text{April}& 500\\ \text{May}& 387\end{array}$

If the cost of each cup of coffee is $1.98.

Number of cups of coffee sold in month of March = 587

Cost of 1 cup of coffee = $1.98

Cost of money take in Month of March $=587\times 1.98=\$1162.26$

Hence, In month of March earned $\$1162.26$ .

(c)

To determine

To find: The cost earn in month of May.

Answer to Problem 4E

  $\$870.75$

Explanation of Solution

Given: The sale of Café Mocha’s Coffee of the month are shown in table.

  $\begin{array}{cc}\text{Month}& \text{Number of cups Sold}\\ \text{January}& 850\\ \text{Febuary}& 765\\ \text{March}& 587\\ \text{April}& 500\\ \text{May}& 387\end{array}$

Number of cups of coffee sold in month of may = 387

Cost of 1 cup of coffee = $2.25

Cost of money take in Month of May $=387\times 2.25=\$870.75$

Hence, In month of March earned $\$870.75$ .