Polygon ABCD is shown below. Which of the following transformations will map it into itself? Select all that apply. a. Reflection around line EF
b. Rotation of 120 degrees around the origin
c. Rotation of 90 degrees around the origin
d. Reflection around line segment DC.
e. Reflection around line segment BC

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212