C=400+0.75yd,I=200-100r,t=70+0.2y,g=100,x=10 derive is equation

I leave a like on all sections for your assistance, thank you.WATER TREATMENT PLANT PROCESS COSTSInformation: (Please see the attached image depicting the schematics + Text)  The results obtained from the four operating modes showed that the hardness decreased by 4.7% when both processes were in operation (i.e., sludge recirculation and aeration). When only sludge was recirculated, the reduction was 3.8%. There was no reduction due to aeration only, or when there was neither aeration nor recirculation. For turbidity, the reduction was 28% when both recirculation and aeration were used. The reduction was 18% when neither aeration nor recirculation was used. The reduction was also 18% when aeration alone was used, which means that aeration alone was of no benefit for turbidity reduction. With sludge recirculation alone, the turbidity reduction was only 6%, meaning that sludge recirculation alone actually resulted in an increase in turbidity-the difference between 18% and 6%. Since…

System of Equations: y=9+3z y=51−3z Value of z Value of y

Compute to three decimal places. (See attached) Initial values are:      PX = $9500     PY = $10000   I = $15000      A = $170000   W = 160 This function is:        Qs = 89830 -40PS +20PX +15PY +2I +.001A +10W

The Retread Tire Company recaps tires. The fixed annual cost of the recapping operation is $60,000. The variable cost of recapping a tire is $9. The company charges $25 to recap a tire. For an annual volume of 12,000 tires, determine the total cost, total revenue, and profit. Determine the annual break-even volume for the Retread Tire Company operation. Graphically illustrate the break-even point using a one way table that relates volume to profit.

Let f(t) be the balance in a savings account at the end of t years and suppose y = f(t) satisfies the differential equation y' = 0.05y - 12,500. (a)Suppose that after one year the balance is $230,000. Is the balance increasing or decreasing at that time? At what rate is it increasing or decreasing at that time? (b)Write the differential equation in the form y' = k(y - M). (c)Describe the differential equation in words. %3D %3D (a) The balance is decreasing at a rate of $ - 1000 per year. (b) y' = .05(y - 230000) (c) Choose the correct answer below. A. The rate of change of the savings account balance is proportional to the balance at the end of t years and is always increasing. B. The rate of change of the savings account balance is proportional to the difference between the balance at the end of t years and $250,000. C. The rate of change of the savings account balance is proportional to the balance at the end of t years and is always decreasing. D. The differential equation gives the…

Define the term, the variation of PW?

please answer the questions on the image attached with work shown, thanks!

Find f'(x). 2 X +2 f(x) = 7x - 6 f'(x) = %3D

what is the terminology for this definition below: Year serving as point of comparison for other years