(x - 1)² + (y + 3)² = -4
Identify the center and radius and explain how you got the answer

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?