.com/was/ui/v2/assessment-player/index.html?launchid=7cf6103b-7d15-4683-8671-0929346d0426#/question/5 iCloud @ MARI O BARIS WHEN B ER A PEAR of Apple# 8 { n ( M Safari +#) ( *#8X#* ( M Safari #9> (1) M Gmail Question 6 of 9 - /16 3 : The number of species of coastal dune plants in Australia decreases as the latitude, in 'S, increases. There are 34 species at 11'S and 26 species at 44 S.1 (a) Find a formula for the number, N, of species of coastal dune plants in Australia as a linear function of the latitude, l, in 'S. NOTE: Round the slope to four decimal places and the intercept to two decimal places. N (1 ) = (b) Choose the sentence that gives the best interpretation of the slope. Choose one (c) Use a graph of the function between l = 11'S and l = 44'S (Australia lies entirely within these latitudes) to describe the behavior of the function. The graph of this function between I = 11'S and / = 44'S is Choose one from the point Choose one , Choose one to the point Choose one , Choose one MacBook Pro C GSearch or type URL @ % ... & 6 O N 3 8 W E R T Y U OQuestion 9 of9 [The maximum heart rate (M H R): is the maximum number of times la person's heart can safely beat in one minute. l . - . IIf M H R is 1n beats per mlnute and a is age in years, the formulas 'used to estimate M H R are: For females: MHR: 226e For males: MHR: 230, ' Recently it has been suggested that a more accurate predictor of M H R for both males alnd females is given by M H R = 208 0.7a. (a) At what age do the old and new formulas give the same MHR 4 for females? For males? - . For females, the ill-'1'\" H R is the same in the two formulas at I: .II years of age. For males, the M H R is the same in the two formulas at [:1 years of age. (13) Vt'hieh of the following is true? Choose one v (e) W hen testing for heart disease, doctors ask patients to walk on a treadmill while the speed and incline are gradually increased until their heart rates reach 85 percent of the M H R. For a 65-year-old male, what is the difference in beats per minute between the heart rate reached if the old formula is used and the heart rate reached .' l {a} At what age do the old and new formulas give me Same M' for females? F01. maleS? - . . .4 _ I . For females, the M H R is the same in the-two formulas: at: years of age. I l I I For males, the M H R is the same in the two formulas at - I years of age. l k l (b) Which of the following is true? (0) When testing for heart disease, doctors ask patients to walk on a treadmill while the speed and incline are gradually increased until their heart rates reach 85 percent of the M H R. For a 65year-old male, what is the difference in beats per minute between the heart rate reached if the old formula is used and the heart rate reached- if the new formula is used? ' The difference is :] beats per minute more under the new formula eTextbook and Media Save for Later 12.8 / 16 Question 2 of 8 View Policies Show Attempt History Current Attempt in Progress Your answer is partially correct. The table below gives the net sales in billions of dollars of The Gap, a clothing retailer.1 Gap net sales, in billions of dollars Year 2011 2012 2013 2014 2015 Sales 14,55 15.65 16.15 16.44 15.80 (a) Find the change in net sales between 2011 and 2015. The change in net sales between 2011 and 2015 is 1.25 billion dollars. (b) Find the average rate of change in net sales between 2011 and 2015. Give units and interpret your answer. Round your answer to two decimal places. The Gap's net sales increased on average by i 1.56 billion dollars per year between 2011 and 2015 (c) From 2011 to 2015, were there any one-year intervals during which the average rate of change was negative? If so, when? The average rate of change was negative from 2014 to 2015. www.last10k.com, 10-K March 2016, accessed December 30, 2016. MacBook Pig C G Search or type URL + 3 7 8 9 O W E R T Y U O P S D F G H Kr1 eaten E: anaemia or. E e-n El .11 Safari : 1'7 tart-Eta 53 . . . . 1 The table below shows the production of tobacco In the US, In millions of pounds. 2010 2011 2012 2013 2014 2015 718 598 763 724 I Tobacco production, in millions of pounds Production Production la) What is the average rate of change in tobacco production between 2005 and 2015? Give units and interpret your answ: l _ _ - - of tobacco production. Round your answer to two decimal places. _ I in the years between 2005 and 2015, the production of tobacco at a rate of approximately ' I . L : - (b1 During this twelve-year period, are there any one-year intervalsduring which the average rate of change was positive? If ' ' 205 and 2005' 2006 and 2007. 200? and 20.03. 2003 and 2009, 201151-13: 1wwvirxstatistacom. accessed September 18, 2016. eTextbook and Media .. _ .__ ._, Search or type URL 9.6 / 12 8 : Question 4 of 8 Current Attempt in Progress Your answer is partially correct. The figure below shows the length, L, in cm, of a sturgeon (a type of fish) as a function of the time, t, in years.1 L (cm) 150 100 50 t ( yr) 5 10 15 20 (a) Is the function increasing or decreasing? Is the graph concave up or concave down? This function is increasing |and the graph is concave down (b) Estimate the average rate of growth of the sturgeon between t = 10 and t = 20. Round your answer to the nearest integer. During this ten year period, the sturgeon's length increased at an average rate of i centimeters per year Data from L. von Bertalanffy, General System Theory, p. 177 (New York: Braziller, 1968). e Textbook and Media Save for Later Attempts: 2 of 10 used Submit Answhy MarBook Pio C G Search or type URL + V % . .. A & W # 4 5 8 O E R T Y U O Pour afnsWeris correct. (a) Is the average rate of change in nicotine level positive or negative? How do you know? As-time passes after a cigarette is smoked. the nicotine level in the body , so the average rate of change I5_ .15) Find the average rate of change in the nicotine level between r = 0 and r = 4. Give units and interpret your answer in terms of | "the drug. I ' .-. I Enter'the rate as a positive value. round ed to three decimal places. I n . .. . I 'l . ._ b During this four hour period. nicotine at an average rate of - . . - _ _ _ . __ i 12.44 / 16 Question 6 of 8 Show Attempt History Current Attempt in Progress Your answer is partially correct. The table below shows the concentration, c, of creatinine in the bloodstream of a dog. 2 6 8 10 (minutes) c (mg/ml) 0.439 0.383 0.336 0.298 0.266 (a) (i) Find the average rate at which the concentration is changing between the 6th and 8th minutes. Average rate of change (mg/ml)/min. (ii) Find the average rate at which the concentration is changing between the 8th and 10th minutes. Average rate of change i (mg/ml)/min. (b) Explain the sign and relative magnitudes of your results in terms of creatinine. The signs are negative because the concentration is decreasing The magnitude of the decrease decreasing because, as the concentration falls , the rate at which it falls decreases 1From M. R. Cullen, Linear Models in Biology (Chichester: Ellis Horwood, 1985). MacBook Pro - C G Search or type URL + W # % N 5 6 8 O W E R T Y U O P S D F G H K L8 / 16 Question 8 of 8