Is √1/4rational or iraational

What is the percent of increase for a population that changed from 438,000 to 561,000

What number produces an irrational number when multiplied by -1.25

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.