25) Wal-Mart is having a sale on packs of pencils. A pack of 24 pencils is on sale for $0.48. I plan to buy 20 packs of pencils. How much will I spend on pencils before sales tax? I will spend on pencils before tax.

$9.60

Step-by-step explanation:

d. The random variable is the number of years in which the temperature increased from the previous year.

Step-by-step explanation:

The random variable is the amount of years that have higher average temperatures than its previous year.

As the sample is from 5 years, the random variable can take values from 0 (where none of the years increase their average temperature from its previous year) to 4 (where every year increases the average temperature).