Geometry? ?

i will give brainliest : )

me find the length of ec below, and explain thoroughly. you can round your final answer if you wish.

additional info:

de is parallel to ac.

angle c is 60°.

angle a and angle bde are both right angles.

triangle abc is similar to triangle dbe.

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered