8 4. Ms. B has 12 girls in her class and 9 boys. What is the probability she walls on a girl and
then a boy to work out a problem, if she is not
2
calling on people more than once?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

The reflexive property of congruence lets you say that ∠pqr ≅

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