Using the following equation, complete the square and find the center and radius of the circle: x^2+ y^2 + 4x - 6y - 12 =0 Please help it’s a timed test

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Find the amplitude of a sinusoidal function that models this temperature variation

How do i take any fraction and make it into a decimal or percentage?