A company manufactures mountain bikes. The research department produced the marginal cost function C′​(x)=500− x 3​, 0≤x≤900​, where C′​(x) is in dollars and x is the number of bikes produced per month. Compute the increase in cost going from a production level of 600 bikes per month to 720 bikes per month. Set up a definite integral and evaluate it.

Mikkelson corporation's stock had a required return of 12.50% last year, when the risk-free rate was 3% and the market risk premium was 4.75%. then an increase in investor risk aversion caused the market risk premium to rise by 2%. the risk-free rate and the firm's beta remain unchanged. what is the company's new required rate of return? (hint: first calculate the beta, then find the required return.) do not round your intermediate calculations.

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What is difference between fiscal year and tax year? explain in the simplest way.