Which of the following is an equation that best describes compound interest?

Which graph shows a function with a range of all real numbers greater than or equal to -1

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)