Question

Rob collects data about how many customers enter and leave a store every hour. He records a positive number for additional customers entering the store each hour and a negative number for customers leaving the store each hour. Drag and drop the correct choices into the boxes to complete the answers to the questions.

Answer 1

The required solution is 4:00 to 5:00 and  87  customers.

It is required to fill in the blanks.

What is arithmetic?

The arithmetic refers to working with numbers by doing addition, subtraction, multiplication, and division. Fractions, decimals, percentages, fractions, square root, exponents, and other arithmetic operations are used to achieve mathematical simplifications.

Given:

According to question , Initially, there were 75 customers.

From 1:00 to 2:00, a total of 30 more people entered, meaning there were

 75 + 30 - 12

= 93 people.

From 2:00 to 3:00, a total of 14 more people entered, meaning there were

93 + 14 - 8  

= 99 people.

From 3:00 to 4:00, a total of 18 people entered, meaning there were

 99 + 18 - 30

= 87 people.

4:00 to 5:00   :  If the store does not accept any more customers except those who are already inside then, all 87 must leave between 4:00 to 5:00 in order to left from the store by 5:00.

Therefore, the required solution is 4:00 to 5:00 and  87  customers.

Learn more about arithmetic here:

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Answer 2

1) 3:00 to 4:00

• The absolute value of the number of people leaving is greater than the absolute value of the number of people entering.

2) 103

• From 1:00 to 2:00, a total of 14 more people entered, meaning there were 99 people.
• From 2:00 to 3:00, a total of 8 more people entered, meaning there were 107 people.
• From 3:00 to 4:00, a total of 4 people left, meaning there were 103 people.