Mark has $100 gift card to buy apps for his smartphone. Each week, he buys one new app for $4.99.Write an equation that relates

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

Need showing work for this problem 56.25 ×25.80

What is perpendicular to y=-1/2x+11