need help with all the following with explanation, please

. . . X Page 14: problems 1,4,10,12,18,20,30,36, and 38 30. Annual sales of music compact discs (CDs) have declined since 2000. Sales were 942.5 million in 2000 and 384.7 million in 2008.24 " For Problems 1-4, find an equation for the line that passes through the given points. 1. (0, 2) and (2, 3) (a) Find a formula for annual sales, S, in millions of music CDs, as a linear function of the number of years, t, since 2000. 4. (4, 5) and (2, -1) (b) Give units for and interpret the slope and the vertical intercept of this function. 10. (a) Which two lines in Figure 1.23 have the same slope? Of these two lines, which has the larger y-intercept? y (c) Use the formula to predict music CD sales in 2012. 13 " Problems 36-41 concern the maximum heart rate (MHR), which is the maximum number of times a person's heart can safely beat in one minute. If MHR is in beats per minute and a is age in years, the formulas used to estimate MHR are 4 X For females: MHR = 226 - a, For males: MHR = 220 - a. (Fig 1.23) (b) Which two lines have the same y-intercept? Of these two lines, which has the larger slope? 12. A car rental company charges a daily fee of $35 plus $0.20 per mile driven. Find a formula for the daily charge, C, in dollars, as a function of the number of miles, m, driven that day. 36. Which of the following is the correct statement? 18. Annual revenue R from Mcdonald's restaurants worldwide between 2013 and 2015 can be estimated by R = 28.1 - 1.35t, A) As you age, your maximum heart rate decreases by one beat per year. where R is in billion dollars and t is in years since January 1, 2013.15 B) As you age, your maximum heart rate decreases by one beat per minute. (a) What is the slope of this function? Include units. Interpret the slope in terms of Mcdonald's revenue. C) As you age, your maximum heart rate decreases by one beat per minute per year. (b) What is the vertical intercept of this function? Include units. Interpret the vertical intercept in terms of Mcdonald's revenue. 38. What can be said about the ages of a male and a female with the same maximum heart rate? (c) What annual revenue does the function predict for 2018? (d) If revenue continues to decline at the same rate, when is annual revenue predicted to fall to 22 billion dollars? Problems 19-21, use Figure 1.25 showing how the quantity, Q, of grass (kg/hectare) in different parts of Namibia depended on the average annual rainfall, r, (mm), in two different years End of document 20. (a) For 1997, find the slope of the line, including units. (b) Interpret the slope in this context. (c) Find the equation of the line. 77.F W E P EPIC 1:10 AM Partly sunny N 9/7/2022