The following table shows the amount of a chemical substance over time. Time (hours) Amount (mg). 37 27 28 32 27 34 26 44 24 25
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- The resistance of a copper wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. A copper wire with a diameter of 0.0126inch has a resistance of 64.9ohms per thousand feet. What length of 0.0201-inch-diameter copper wire will produce a resistance of 33.5ohms?Director of the company wants to find how annual sales are related to area of the store.Develop a regression equation to demonstrate this relationship as shown below. Take annual sales as dependent variable.The following table shows the amount of a chemical substance over time. Time (hours) Amount (mg) 20 42 22 41 38 29 43 17 44 16 (a) Find a linear regression equation based on the table.Round each number to two decimal places and use xx for the variable.ˆy= (b) Using your equation from (b), estimate the amount of the substance in 18 hours.________________________ milligrams