Find the foci of the ellipse whose equation is x^2/16+y^2/36=1

  (0, ±2√5)

Step-by-step explanation:

The foci are the points on the major axis that are the length of the semimajor axis away from the co-vertices.

Here, that means their y-coordinate is ±√(36-16) = ±√20 = ±2√5.

The x-coordinate is that of the major axis, x=0.

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.