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Let's go through each part of the question:

1. **How many hours does Kelly work per day?**

Kelly works 35 hours per week and works 5 days a week. 

So, the number of hours Kelly works per day is:
\[
\frac{35 \, \text{hours per week}}{5 \, \text{days per week}} = 7 \, \text{hours per day}.
\]

2. **How much money does Kelly earn per day?**

Kelly makes $100 per hour, and we just calculated that he works 7 hours per day. 

So, the money he earns per day is:
\[
100 \, \text{dollars per hour} \times 7 \, \text{hours per day} = 700 \, \text{dollars per day}.
\]

3. **If Kelly works 70 hours a week, how much money will he earn per week?**

If Kelly works 70 hours a week at $100 per hour, the total weekly earnings would be:
\[
100 \, \text{dollars per hour} \times 70 \, \text{hours per week} = 7000 \, \text{dollars per week}.
\]

4. **If Kelly works 7 days a week, how much money will Kelly earn on payday?**

Since Kelly works 7 hours per day (calculated earlier) and would work 7 days a week, the total number of hours he would work in the week is:
\[
7 \, \text{hours per day} \times 7 \, \text{days per week} = 49 \, \text{hours per week}.
\]
At $100 per hour, the earnings would be:
\[
100 \, \text{dollars per hour} \times 49 \, \text{hours per week} = 4900 \, \text{dollars per week}.
\]

Would you like further clarification on any part of the solution? Here are some related questions to expand the concept:

1. How much would Kelly earn in a month if he worked 35 hours per week consistently?
2. If Kelly got a 10% raise, how much would he earn per hour and per week (for 35 hours)?
3. What is the total number of hours Kelly works in a year (assuming 52 weeks)?
4. How much money would Kelly earn per week if he worked only 4 days a week at 7 hours per day?
5. If Kelly worked part-time and reduced his hours to 20 hours per week, what would his weekly earnings be?

**Tip:** Always divide or multiply carefully when dealing with per-day, per-week, or per-hour rates to avoid simple mistakes!

Kelly makes $100/h, he works 35 hrs a week, he works 5 days a week. How many hours does Kelly work per day? How much money does Kelly earn per day? If Kelly works 70 hrs a week, how much money will Kelly earn per week? If Kelly works 7 days a week, how much money will Kelly earn on payday?

Solve how many hours Kelly works per day and how much he earns per day with a rate of $100 per hour. Also, calculate Kelly's earnings if he works 70 hours per week or 7 days per week. Suitable for Grades 6-8 students.

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