Matched Problem 4 Repeat Example 4 with production increasing from 6,000 to 6,010. EXAMPLE 4 Cost–Revenue A company manufactures and sells x microprocessors per week. If the weekly cost and revenue equations are C ( x ) = 5 , 000 + 2 x R ( x ) = 10 x − x 2 1 , 000 0 ≤ x ≤ 8 , 000 then use differentials to approximate the changes in revenue and profit if production is increased from 2,000 to 2,010 units per week.
Matched Problem 4 Repeat Example 4 with production increasing from 6,000 to 6,010. EXAMPLE 4 Cost–Revenue A company manufactures and sells x microprocessors per week. If the weekly cost and revenue equations are C ( x ) = 5 , 000 + 2 x R ( x ) = 10 x − x 2 1 , 000 0 ≤ x ≤ 8 , 000 then use differentials to approximate the changes in revenue and profit if production is increased from 2,000 to 2,010 units per week.
Solution Summary: The author calculates the rate of changes in revenue and profit if production from 6,000 to 6,010 units per week by using the differentials.
(a) Suppose we create a model of the height of a shrub (Y) based on the amount of bacteria in the soil
(X1) and whether the plant is located in partial or full sun (X2). Height is measured in cm, bacteria
is measured in thousand per ml of soil (so 1000 is 1 unit), and type of sun =
sun and type of sun =
between shrubs with a 5500 bacteria and those with a 4000 bacteria count. Assuming the sun is the
0 if the plant is in partial
1 if the plant is in full sun. What will be the height difference on average
same for both.
(b) Let's say after a few training steps your model is in this state: Y = 33 + 4.6 * X1+8* X2. Explain
what the effect of the plant being in sun vs. partial shade will have on the average height of the shrub
if there are no bacteria in the soil, based on the model.
Chapter 2 Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences - Boston U.
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