Answer:
Price per television =38.30
Step-by-step explanation:
Number of units sold in one week =230-3x
Price of one unit =x
Total money produced in one week =x(230 - 3x)
(Here it doesn't matter total money is taken for a week or day because after differentiating and equating to zero that factor disappear )
Differentiate total amount with respect to x.
![\frac{dM}{dt}=230-6x](https://tex.z-dn.net/?f=%5Cfrac%7BdM%7D%7Bdt%7D%3D230-6x)
Now equate it equal to zero to get extremum.
230-6x=0
Then, x = 38.30
Answer:
She paid 9% of sales tax
Step-by-step explanation:
The sale price of diamond = $375
Let x be percent of sales tax
So, amount of tax = ![x\% \times 375 = \frac{x}{100} \times 375 =3.75x](https://tex.z-dn.net/?f=x%5C%25%20%5Ctimes%20375%20%3D%20%5Cfrac%7Bx%7D%7B100%7D%20%5Ctimes%20375%20%3D3.75x)
So, Amount including tax = 375+3.75x
We are given that Bethany paid $408.75 for a pair of diamond stud earrings.
So, 375+3.75x=408.75
3.75x=408.75-375
![x=\frac{408.75-375}{3.75}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B408.75-375%7D%7B3.75%7D)
x=9
Hence She paid 9% of sales tax
Answer:
Step-by-step explanation:
4
Answer:
H = 11m
Step-by-step explanation:
As we know, volume = length * breadth/width * height
Given,
length = 6m
Breadth/width = 3 1/2 or 3.5
Height = ?
So, l * b * h = v
=> 6m * 3.5m * h = 231m
=> 21m * h = 231m
=> h = 231m /21m = 11m
Therefore, height = 11m / 11metres
Hope this helps
9 X 9 X 20 X 20
Pido perdón para mí español, pero creo que este es la ecuación.