Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 6p cubedplusx squaredequals850. Determine the rate at which sales are changing at a time when xequals10, pequals5, and the price is falling at the rate of $.40 per week.

9514 1404 393

  increasing 9000 units per week

Step-by-step explanation:

The price and sales relation is given as ...

  6p³ +x² = 850

Differentiating with respect to time gives ...

  18p²·p' +2x·x' = 0

Filling in the given values, we have ...

  18(5)²(-0.40) +2(10)x' = 0

  20x' = 180 . . . . . . add 180

  x' = 9 . . . . . . . . . . divide by 20

Sales are increasing at the rate of 9,000 units per week.

answer: 26

step-by-step explanation:

well, michelle wanted to measure the height of her school's flagpole she placed a mirror on the ground 48 feet from the flagpole then walk backwards until she was able to see the top of the pole in the mirror her eyes were 5 feet above the ground and she was 12 ft from the mirror using similar triangles find the height of the flagpole to the nearest tenth of a foot find the geometric mean of them pair of numbers. its easy math

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2