How many red blood cells does the bone marrow produce every second?

(A) 5 million

(B) 7 million

(C) 10 million

(D) 12 million

 

This problem deals with the question of estimating the cumulative effect of a tax cut on a country's economy. Suppose the government proposes a tax cut totaling $100 million. We assume that all the people who have extra money to spend would spend 80% of it and save 20%. Thus, of the extra income generated by the tax cut, $100(0.8) million = $80 million would be spent and so become extra income to someone else. Assume that these people also spend 80% of their additional income, or $80(0.8) million, and so on. Calculate the total additional spending created by such a tax cut.

% Social Sci 3.4.39 E Question Help 0 The population of a country dropped from 52.4 million in 1995 to 44.6 million in 2009. Assume that P(t), the population, in millions, t years after 1995, is decreasing according to the exponential decay model. a) Find the value of k, and write the equation. b) Estimate the population of the country in 2015. c) After how many years will the population of the country be 2 million, according to this model?

The populations P (in millions) of Zambia from 1950 through 2013 can be modeled by P 2.490276t, where t is the time in years, with t-0 corresponding to 1950. t (a) Find the populations (in million people) in 1950, 1970, 1990, 2000, 2010, and 2012. (Round your answers to two decimal places.) 1950 1970 1990 2000 2010 2012 million people million people million people million people million people million people (b) Explain why the change in population from 1950 to 1970 is not the same as the change in population from 1990 to 2000 The population is increasing exponentially· , not linea rly 、 (c) Use the model to estimate the population (in million people) in 2025. (Round your answer to two decimal places.) million people