In ΔCDE, the measure of ∠E=90°, the measure of ∠C=78°, and DE = 2.2 feet. Find the length of EC to the nearest tenth of a foot.

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

Ana drinks chocolate milk out of glasses that each holdof a liter. she has of a liter of chocolate milk in her refrigerator. 10 how many glasses of chocolate milk can she pour?

Need showing work for this problem 56.25 ×25.80