(1,4) and (2,6) in slope-intercept form

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?