URGENT (please) (15points) Use the model to find how long it will take for 75% of the population of a country to be infected with the a virus. This function models the amount of people free of infection over time. The infection rate 9.8%. Round to the nearest year. (Note: you do not need to know the initial population. If it helps you to look at a specific case with numbers come up with one to examine.)

(any method)

drip

Step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

77

step-by-step explanation: