4. Beki takes two part-time jobs, one following the other. At one job, she earns \( \$ 9 \) per hour for six forty-hour weeks in a row. At the second job, she earns \( \$ 1,600 \) for a four-week month. What is her mean pay per week over this ten week period?

2. After school, students run a carpentry shop. The students charge \( \$ 7 \) per hour. The average job takes 2 students each working 6 hours. Sometimes they work on Saturdays. Then they charge \( \$ 30 \) more for the average job. How much more per hour is the rate on Saturdays? Complete the steps. Find the answer. Cost of average job during the week Cost of average job on Saturdays Rate that students charge on Saturdays Increase in hourly rate on Saturdays

Given the series \( \sum_{k=1}^{12}[-2+(k-1) 5] \) , find the following values: \( a_{1}=\square \) \( d=\square \) \( n=\square \) \( \sum_{k=1}^{12}[-2+(k-1) 5]= \)

Redondea 2.91 al décimo más cercano.

Complete the following parts without a calculator. a) \( 7-1.43 \) is the same as \( \square-1.42 \). b) \( 22 \times 5 \) is the same as \( \square \times 10 \). c) If I am given \( 22 \times 38=836 \), that means \( 23 \times 38=\square \). d) Given \( 3623-3207=416 \), we know that \( 3614-\square=416 \). e) \( 19 \times 12 \) is the same as \( 20 \times 12-\square \).

Evaluate the absolute value of \( -8 \).