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26. [11 Points] HARMATHAP12 9.6.044. E The relation between the magnitude of a sensation y and the magnitude of the stimulus X is given by
26. [11 Points] HARMATHAP12 9.6.044. E The relation between the magnitude of a sensation y and the magnitude of the stimulus X is given by y = k(x X0)\" where k is a constant, x is the threshold of effective stimulus, and n depends on the type of stimulus. Find the rate of change of sensation With respect to the amount of stimulus given. CI For electrical stimulation 3/ = k(x 7 x0)\"2 l y: Need Help? 28. [15 Points] HARMATHAP12 9.6.049.EP. MY NOTES If an IRA is a variable-rate investment for 2D years at rate r percent per year, compounded monthly, then the future value 5 that accumulates from an initial investment of $500 is 0.0112\"0 S : SOO|:1 + Find the rate of change of S with respect to r. d5 F (a) What is the rate of change in future value 5 when r = 6 percent and what does it tell us? (Round your answer to two decimal places.) 5\"" r:6 If the Interest rate were to increase by 1%, the future value of the investment would increase by about $ \\:|. (b) What is the rate of change in future value 5 when r = 12 percent and what does it tell us? (Round your answer to two deCimal places.) \"3 - E or r : 12 If the interest rate were to increase by 1%, the future value of the investment would increase by about $ \\:|. Need Hell)? I ndll I 29. [I1 Points] DETAILS HARMATHAP12 9.7.039. If the na:iona| consumption function is given by CW) = 100 + a)\" where y is the national disposable income, find the marginal propensity to consume, dC/o'y. + O.9y+6 dC/ay = Need Help? 30. [I1 Points] DETAILS HARMATHAP12 9.7.040.Ml. Suppose that the demand function for q units of an appliance priced at $0 per unit is given by 3600: 1} 2 . (a + 2) Find the rate of change of price with respect to the number of appliances. p: r p: Need Help
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