Which ratio is equivalent to 4:10? Choose ALL the equivalent ratios

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

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?