please help with these questions on exponential growth and decay

2. At a neighborhood barbecue, a child leaves a glass of soda on your porch. If the temperature outside is 32C and it took 53 minutes for the soda to heat from its initial temperature of 1C to 3000, What is k? HINT: Newton's Law of Cooling is T = (To Ta)e_kt + Ta moi0) O k: 3 5 53 111%) O k = 53 4. Find the exponential decay model that satises % 2 kg, decays at 9% per year, and has the initial condition 31(0) : 5. O y : 580th O y : 6-0-091th 4 O y : 560.0% 0 y : 8009: _ 5 O y260'09'+4 5. The half-life of a 1000 gram substance is 50 years. If it decays according to an exponential growth model, the amount of time it will take for the substance to be only 100 g is O Between 165 and 170 years 0 Between 155 and 160 years 0 Between 160 and 165 years 0 Between 150 and 155 years