MOHAMED: Geometry Consider this diagram of a circle with center A.
B
с
Which fact must be true?
o A. mZDAE =mZDCE
O B. DB = 2DA
C. mZDCE = 2m ZDBE
D. AD = AE

Plz heeeeeeelp plz give me the answer

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Using the figure below, select the two pairs of alternate interior angles.a: point 1 and point 4 b : point 2 and point 3 c: point 6 and point 6d: point 5 and point 7