Simplify following expression 4(1+9x)

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.

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Write the equation in logarithmic form e^x=403.429