1. 2. The number of people affected by a particular strain of virus, denoted by f (t) where t is the time in months from January 22, 2020, was estimated to follow exponential growth if preventive measures are not initiated. The number of infected in January 2020 were 987, while 79,638 were infected in February 22, 2020. (Source: https:ilwww.wor|dometers.infoi'ooronavirus/worldwidegraphsl#case-timeline) a. What is the function that represents the number of people affected by the strain of the virus? b. If no preventive measures were taken, how long would it take for the number of infected people to reach 1,000,000? A certain island has been contaminated with strontium-90 from a nuclear explosion. Scientists believe that the island will be safe for human habitation only when 1% of the amount from the explosion remains. The half-life of strontium-90 is 28.8 years, and the amount f of strontium-90 left after it years is given by the function y = Ce\". a. What is the rate of decay of strontium-90? b. How long after the explosion will it be safe from humans to live on the island again