Course Calendar Gradebook Home > Precalculus Math 260 Spring 2023 > Assessment 6.7: Practice Progress saved Done Voce Score: 0/100 4/10 answered . Question 4 0/10 pts 9 3 # 4 0 Details At the beginning of an experiment, a scientist has 164 grams of radioactive goo. After 75 minutes, her sample has decayed to 10.25 grams. What is the half-life of the goo in minutes? Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 80 minutes? You may enter the exact value or round to 2 decimal places. Question Help: Video Submit QuestionmyopenMath Home | My Classes . | User Settings | Log Out Kevin NGUYEN {} Course Calendar | Gradebook Home > Precalculus Math 260 Spring 2023 > Assessment 6.7: Practice Progress saved Done VOCO Score: 0/100 3/10 answered . Question 5 0/10 pts 93 3 0 Details A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made? (The half-life of carbon-14 is 5730 years.) years Question Help: Video Submit QuestionCourse Calendar | Gradebook Home > Precalculus Math 260 Spring 2023 > Assessment 6.7: Practice Progress saved Done Score: 0/100 3/10 answered . Question 6 0/10 pts 0 3 4 0 Details A bacteria culture initially contains 3000 bacteria and doubles every half hour. Find the size of the baterial population after 20 minutes. Find the size of the baterial population after 7 hours. Question Help: Video Submit QuestionCourse Calendar Gradebook Home > Precalculus Math 260 Spring 2023 > Assessment 6.7: Practice Progress saved Done Score: 0/100 3/10 answered Question 7 0/10 pts 93 # 4 0 Details The doubling period of a bacterial population is 10 minutes. At time t = 110 minutes, the bacterial population was 60000. What was the initial population at time t = 0? Find the size of the bacterial population after 5 hours. Question Help: Video 1 Video 2 Submit Question6.7: Practice Score: OHOD 2510 answered . Question 8 V ( > The count in a bacteria culture was 200 after 10 minutes and 1900 after 30 minutes. Assuming the count grows exponentially; What was the initial size of the culture? Find the doubling period. Find the population after 65 minutes' :] When will the population reach 10000. You may enter the exact vaLue or round to 2 decimal places. Question Help: E] Video Progress saved Done a 16' Bonapts 03 83 @Details Calendar Gradebaok Home '2 F'recalculus Math 260 Spring 2023 ) Assessment 6.7: Practice Progress saved Done @ {6' Score: 02'100 2:10 answered I Question 9 v B 0:10 pts 0 3 3 0 Details Find the time required for an investment of 5000 dollars to grow to 6000 dollars at an interest rate of 7.5 percent per year, compounded quarterly. Your answer is t = I years. You may enter the exact value or round to 2 decimal places. Question Help: E] Video Submit Question Home > Precalculus Math 260 Spring 2023 > Assessment Chapter 6 Review Problems Progress saved Done Voce Score: 40/270 4/27 answered Question 7 10 pts 91 2 4 0 Details A house was valued at $115,000 in the year 1989. The value appreciated to $160,000 by the year 2001. Use the compound interest formula S = P(1 + r) to answer the following questions. A) What was the annual growth rate between 1989 and 2001? r = Round the growth rate to 4 decimal places. B) What is the correct answer to part A written in percentage form? %. C) Assume that the house value continues to grow by the same percentage. What will the value equal in the year 2004 ? value = $ Round to the nearest thousand dollars. Question Help: Video Submit QuestionChapter 6 Review Problems Score: 40f2?0 452? answered Progress saved Done a {5' 0 Question 8 v B 10 pts {)1 3 4 G) Details The fox population in a certain region has a continuous growth rate of 9 percent per year. It is estimated that the population in the year 2000 was 26400. {a} Find a function that. models the population t years after 2000 [t = 0 for 2000]. Your answer is P) =| ' [b] Use the function from part (a) to estimate the fox population in the year 2008. Your answer is [the answer must be an integer)| Home > Precalculus Math 260 Spring 2023 > Assessment Chapter 6 Review Problems Progress saved Done Score: 40/270 4/27 answered Question 10 10 pts 91 4 0 Details Find an equation for the graph sketched below -5 -4 -3 -2 - f(x) = Submit Question