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otez555 [7]
3 years ago
8

An ellipse has a major semi-axis of 20 cm and a minor semi-axis of 14 cm. find the area.

Mathematics
1 answer:
avanturin [10]3 years ago
8 0
In order to answer the question, you need to know the formula area of an ellipse.

Area = pi * a * b
a = minor axis
b = major semi-axis

Area = 3.14 * 20 * 14
Area = 879.20 cm^2
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If the midpoint of (4, 3) and point A has coordinates (-2, 6), what are the coordinates of point B?
baherus [9]
(xA+xB)/2, (yA+yB)/2 = (4,3)
(xA+xB)/2 = 4
(-2+xB) = 8 --> xB = 8+2 --> xB = 10
(yA+yB)/2 = 3
(6+yB) = 6 --> yB = 6-6 --> yB = 0

B = (10,0)
5 0
3 years ago
A bill from a plumber was $306 The plumber charged $150 for parts and $52 per hour for labor. How long did ths plumber work at h
ludmilkaskok [199]
We can make an equation from this.
Our intial value is 150 for parts, and he works for 52 dollars an hour.
We can define <em /><em>h</em> for hours and <em /><em>c</em> for total cost.
Therefore, we have:
c = 150 + 52h.
We can set this equal to 306 dollars, as that's the given total cost:
306 = 150 + 52h
Subtract 150 from both sides:
52h = 156
Divide both sides by 2:
h = 3
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hope this helped!

6 0
3 years ago
What is the area of a circle. Using 3.14 for. A circle with diameter of 8.4 ft.
ira [324]

Hey there! I'm happy to help!

First, let's find the radius. The radius is half of the diameter.

8.4/2=4.2

Here's how to find the area of a circle.

Square the radius.

4.2²=17.64

And multiply by pi (3.14 in our case)

17.64(3.14)=55.3896

We round to the nearest tenth, giving us an area of 55.4 ft²

Have a wonderful day! :D

5 0
3 years ago
Find the perimeter of the triangle. Recall that the perimeter of a figure is the distance around a figure.
Svet_ta [14]

Answer:

1 inch

Step-by-step explanation:

The perimeter is the sum of the lengths of the sides:

Perimeter = 3/23 + 9/23 + 11/23 = (3 + 9 + 11)/23 = 23/23 = 1

8 0
2 years ago
Translate to an equation and solve the product of 2 and a number increased by 8 is -48
Marizza181 [45]
The equation would be 2x+8=-48 and x=-28
4 0
4 years ago
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