Which of the following is the equation for a circle with a radius of r and center at (h, k)

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.

Me. i can't figure out this question. give an explanation too. .

Find the area of the unshaded square