Answer:
8-4=4 so since he sold 47 it would be 188 dollars profit
Step-by-step explanation:
Answer:
The dimensions of the box is 6 × 6 units.
Step-by-step explanation:
Chloe fill a sand box whose area is 36 square units.
Let length be x units and width be y units.
Area of box = 36
![xy=36\\y=\dfrac{36}{x}\ \ \ ...(i)](https://tex.z-dn.net/?f=xy%3D36%5C%5Cy%3D%5Cdfrac%7B36%7D%7Bx%7D%5C%20%5C%20%5C%20...%28i%29)
Perimeter of box, ![P=2(x+y)](https://tex.z-dn.net/?f=P%3D2%28x%2By%29)
![P=2(x+\dfrac{36}{x})\ \ \ \ \ \ \ \ [\text{ From }(i)]](https://tex.z-dn.net/?f=P%3D2%28x%2B%5Cdfrac%7B36%7D%7Bx%7D%29%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5B%5Ctext%7B%20From%20%7D%28i%29%5D)
Differentiate w.r to x
![\dfrac{dP}{dx}=2(1-\dfrac{36}{x^2})](https://tex.z-dn.net/?f=%5Cdfrac%7BdP%7D%7Bdx%7D%3D2%281-%5Cdfrac%7B36%7D%7Bx%5E2%7D%29)
For critical point, ![\dfrac{dP}{dx}=0](https://tex.z-dn.net/?f=%5Cdfrac%7BdP%7D%7Bdx%7D%3D0)
![\therefore 2(1-\dfrac{36}{x^2})=0](https://tex.z-dn.net/?f=%5Ctherefore%202%281-%5Cdfrac%7B36%7D%7Bx%5E2%7D%29%3D0)
![\Rightarrow x=\pm6](https://tex.z-dn.net/?f=%5CRightarrow%20x%3D%5Cpm6)
x can't be negative.
![\dfrac{d^2P}{dx^2}=\dfrac{144}{x^3}\\\dfrac{d^2P}{dx^2}|_{x=6}=\dfrac{144}{216}>0(\text{min})](https://tex.z-dn.net/?f=%5Cdfrac%7Bd%5E2P%7D%7Bdx%5E2%7D%3D%5Cdfrac%7B144%7D%7Bx%5E3%7D%5C%5C%5Cdfrac%7Bd%5E2P%7D%7Bdx%5E2%7D%7C_%7Bx%3D6%7D%3D%5Cdfrac%7B144%7D%7B216%7D%3E0%28%5Ctext%7Bmin%7D%29)
units
Hence, Length = 6 units and width = 6 units
AC is a line with length of 7 units, from -7 to 0
BE is a line with length of 6 units, from 0 to 6
Two shapes are congruent if their length are the same, hence AC and BE is not congruent
Answer:
B= 6
Step-by-step explanation:
pythagorean theorem formula is a² + b² = c²
so: 8² + b² = 10²
then: 64 + b² = 100
subtract 64 from both sides to get b²= 36
square root 36 and you get 6 for b
answer: B= 6
Answer :
no. of days used to repair 1250m of road = 5
no. of days used to repair 1m of road = 5/1250
no. of days used to repair 8000m of road (8*1000m ) = 5/1250*8000= 32 days