In a population of 200,000 people, 40,000 are infected with a virus. After a person becomes infected and then recovers, the person is immune (cannot become infected again). Of the people who are infected, 5% will die each year and the others will recover. Of the people who have never been infected, 30% will become infected each year. How many people will be infected in 4 years? (Round your answer to the nearest whole number.) X people

Roll a fair die repeatedly; X� represents the number of rolls it takes to get a six.

The population of a city with 750,000 is devastated by an unknown virus that kills 20% of the population per day. How many people are left after a week? Round answer to the nearest whole number since we can't have 0.2people

(07.04 LC) Mellie is conducting a test on mold spores on bread. She uses 6 slices of bread to compare two strains of mold. She applies one strain to the left side of the bread and one strain to the right side. She flips a coin to decide which strain goes on the right side of the bread. The mold spores that appear on each side are counted and she records them in a table. Bread Number of Spots for Strain 1 Number of Spots for Strain 2 1 30 19 2 21 17 3 15 15 4 13 12 5 6 9. 6 8 4 If Mellie is to perform an appropriate t-test to determine if there is a mean difference between the number of spots per piece of bread produced by the two strains, how many degrees of freedom should she use? 4 10 12 5