3 years ago

Which is the best approximation of the number of square inches of paint needed to paint a circle whose diameter is 7 inches?

Mathematics

2 answers:

aleksandr82 [10.1K]3 years ago

4 0

Answer:

38 in2

Step-by-step explanation:

The area of a circle is defined by pi*r squared, just multiply 3.14*3.5*3.5, since the diameter of the circle is just two times the radius.

nordsb [41]3 years ago

4 0

Ans.
38 in2

Your welcome

You might be interested in

I know the answer to number 7 but I just want to see if you guys know it

elixir [45]

Plugging 10 for k in the expression gives us
$2(10)^2+5(10)+1$ We simplify this expression to $200+50+1=251$
251 is your answer

4 0

4 years ago

Read 2 more answers

What is 2x+8y=12 in slope intercept form <br>as well as x-2y=0 in slope intercept form

earnstyle [38]

$the \ slope \ intercept \ form \ is : \\ \\ y= mx +b \\ \\ 2x+8y=12 \ \ |-2x \\ \\8y=-2x+12\ \ /:8\\ \\y=-\frac{2}{8}x+\frac{12}{8}$

$y=-\frac{1}{4}x+\frac{3}{4}\\ \\ m=-\frac{1}{4}$

$x-2y=0 \ \ | -x \\ \\-2y=-x \ \ /:(-2)\\ \\y=\frac{1}{2}x \\ \\ m= \frac{1}{2}$

8 0

3 years ago

Read 2 more answers

Calculate the volume of the pyramid above. <br> V = ? m3

Vadim26 [7]

V = lwh/3
= 5x3x1/3
= 15/3
= 5
Therefore the volume is 5 meter cubed.

3 0

3 years ago

Identify Like terms : 3y2, 2/3x, -3/4y2, 5x, 12x2

wel

3y^2 and -3/4y^2
5x and 2/3x
12x^2

4 0

3 years ago

5. Solve for x using any method you'd like. Round to the hundredth. Show all your work. (2 points each) d. 20x^3 = 7x^5

Sindrei [870]

Solving this equation for x, we have:

$\begin{gathered} 20x^3=7x^5 \\ 7x^5-20x^3=0 \\ x^3(7x^2-20)=0 \\ \begin{cases}x^3=0\to x=0 \\ 7x^2=20\to x=\pm\sqrt[]{\frac{20}{7}}\end{cases} \end{gathered}$

6 0

1 year ago