11. [-I2 Points] I DETAILS I TANAPCALCBR103.7.036. I MYNOTES II ASKYOURTEACHER I Effect of Advertising on Profits The relationship between a certain real estate company's quarterly profits, P(x), and the amount of money x spent on advertising per quarter is described by the following function where both P(x) and X are measured in thousands of dollars. P(X) = {3x2 + 9x + 30 (o s x s 50) Use differentials to estimate the increase in prots (in dollars) when advertising expenditure each quarter is increased from $23,000 to $25,000. $ :1 Need Help? 12. [-IZ Points] DETAILS TANAPCALCBR10 3.7.042. MY NOTES ASK YOUR TEACHER Forecasting Commodity Prices Government economists in a certain country have determined that the demand equation for soybeans is given by 56 p=f(x)=2 2X+1 where the unit price p is expressed in dollars per bushel and X, the quantity demanded per year, is measured in billions of bushels. The economists are forecasting a harvest of 1.9 billion bushels for the year, with a possible error of 10% in their forecast. Use differentials to approximate the corresponding error in the predicted price per bushel of soybeans. (Round your answer to one decimal place.) i dollars per bushel Need Help