I really need help , can anybody please help me???

Asquare parking lot has 6,400 square meters what is the length in meters

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.

If square root x = -7, then x= -49 true or false