What is the sum of 8a
7+ 5b2 – 2a2 and 7b2 + 66_
20a + 3?

The circumference of a circle is 5 pi cm. what is the area of the circle?

He concluded that a heavier object dropped from the same height as a lighter object will land

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