Question 7 (1 point) Initially, 10 people have an infection. The next day, every infected person infects one more person. If this pattern continues, how many days will it take for 1280 people to be infected? 10 days 7 days 128 days 64 days Question 8 (1 point) Household smoke detectors contain 200jug of a radioactive element that has a half-life of 432 years. To the nearest 10/g, how much of this element will remain after 20 years? 180 ug 100 ug O 200 ug 190 ugQuestion 3 (1 point) A bacteria population quadruples every hour. What type of relation best describes how the population is related to time? **in your solutions explain/show how you made this decision exponential quadratic Linear none of the above Question 4 (1 point) The decay of 200 particles of a particular radioactive substance is given by y = 200(0. 93 ), where x is the number of days and y is the number of particles remaining. It costs the laboratory $1.50 per day to store each particle. What is the cost of storing the particles on the fourth day? Round to the nearest dollar. O $150 $81 $225 O $100Question 1 (1 point) Suppose $1200 is deposited into an account that pays 3.5% per year, compounded annually. The amount in the account A, is given by the equation A = 1200(1. 035)", where n is the number of years the money is in the account. Approximately how many years will it take for the money to double in value? 21years 22years 20years 17years Question 2 (1 point) Suppose $900 is deposited into an account that pays 6.4% per year, compounded annually. The amount in the account A, is given by the equation A - 900(1. 064)" , where n is the number of years the money is in the account. Approximately how many years will it take for the money to triple in value? 18 years 10 years 24 years 11 yearsQuestion 5 (1 point) The decay of 200 particles of a particular radioactive substance is given by y = 200(0. 93), where x is the number of days and y is the number of particles remaining. It costs the laboratory $1.50 per day to store each particle. On which day will the cost to store the particles be $135. O day 9 O day 4 O day 5 day 11 Question 6 (1 point) An investment starts at $900 and doubles in value each year. What is the value of the investment after 5 years? $900 $28 800 O $14 400 $4500