Scarlet deposited $500 in a savings account with simple interest. One year later she had earned $30 in interest. What was the interest rate?

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.