Quadrilateral A'B'C'D'is the image of quadrilateral of ABCD under a rotation of about the origin (0,0) a. -90
b. -30
c. 30
d. 90​

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

With finding limits of multi variable !

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