1) we calculate the area of the circular piece of metal.
area=πr²
area=π(3.5 m)²=12.25π m² ≈ 38.48 m²

2)we calculate the total cost of the circular piece of meta by the rule of three.

$3.25-------------------1 m²
x--------------------------38.48 m²

x=($3.25 * 38.48m²) / 1 m²=125.06$

Answer: 125.06$

We can also calcultate the total cost of the ciucular piece of metal by the ratius.
Ratius=$3.25/1m²

Total cost=ratius * area of the circular piece of metal.
total cost=($3.25/ m²)*(38.48 m²)=$125.06

Answer: $125.06

4 0

3 years ago

Please answer asap this person made a mistake what is the error and correct solution to this problem

stiv31 [10]

Answer:

Step-by-step explanation:

Hello, please consider the following.

$(4+x)^2=4^2+2\cdot 4\cdot x+x^2=16+\boxed{8}x+x^2\\\\\text{ ... and not ...}\\\\16+\boxed{4}x+x^2$

So the correct equation becomes.

$x^2+64=16+8x+x^2\\\\8x=64-16=48\\\\\text{ we divide by 8 both sides of the equation.}\\\\x=\dfrac{45}{8}=6$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

6 0

3 years ago

Read 2 more answers

a business logo consists of a rectangle and a triangle. The area of the triangle is 36 square units and the area of the rectangl

-Dominant- [34]

It is already given in the problem that the area of the triangle logo is 36 square units and the area of the rectangle is 54 square units. Considering that there are no additional places in the logo except the triangle and the rectangle, we have to determine the percentage of the total area of the logo covered by the triangle.
NOw
Total area covered by the triangle and the rectangle logo = (36 + 54) square units
   = 90 square units
Then
The percentage area covered by the triangle logo = (36/90) * 100 percent
   = (36/9) * 10 percent
   = (4 * 10) percent
       = 40 percent
So 40 percent is the area covered by the triangle logo.So option "H" is the correct option in the given problem.

3 0

3 years ago