Mathematics, 06.03.2020 22:27 gabmilex1
Question 3 (5 points): In a certain region each person is understood to live either in the city or the suburbs. Each year 6% of the city population moves to the suburb (and the rest stays in the city). Also each year 4% of the suburb population moves to the city (and the rest stay in the suburbs). Suppose that x1 is the number of people who live the city in a certain year, and x2 is the number of people who live in the suburb in that same year. Let y1 be the number of people who live in the city the year after, and similarly y2 be the number who live in the suburbs. (a) Write down a formula for y1 in terms of x1 and x2. Then write down a formula for y2 in terms of x1 and x2. (b) Let x = x1 x2 and y = y1 y2 . Use your answer in part (a) to find a matrix A such that y = Ax (c) Suppose that in 2020 there are 10,000,000 people in the city and 800,000 in the suburbs. What is the population in the city and in the suburb in the year 2021? (d) What is the population in the city and in the suburb in the year 2022? (Calculators are allowed)
Answers: 1
Mathematics, 21.06.2019 14:30
Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0
Answers: 3
Mathematics, 21.06.2019 19:00
You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?
Answers: 1
Mathematics, 21.06.2019 21:30
Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.
Answers: 2
Question 3 (5 points): In a certain region each person is understood to live either in the city or t...
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