Megan's dog sparky eats for 1/4 cups of food east explain how megan can determine how much food to give this party if she needs to feed him only two-thirds as much

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

50 points and will mark brainlest if you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking:

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?