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const2013 [10]
3 years ago
8

Please help answer this problem

Mathematics
1 answer:
gtnhenbr [62]3 years ago
5 0
Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease.
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write an equation of the circle that is tangent to both axes with radius sqrt5 and center in quadrant 3
Helen [10]
Check the picture below.

\bf \textit{equation of a circle}\\\\ 
(x-{{ h}})^2+(y-{{ k}})^2={{ r}}^2
~~ 
\begin{array}{lllll}
center~(&\quad {{ h}},&\quad {{ k}}\quad )\qquad 
radius=&{{ r}}\\
&-\sqrt{5}&-\sqrt{5}&\sqrt{5}
\end{array}
\\\\\\\
[x-(-\sqrt{5})]^2+[y-(-\sqrt{5})]^2=(\sqrt{5})^2
\\\\\\
(x+\sqrt{5})^2+(y+\sqrt{5})^2=5

7 0
4 years ago
Express the first number as a percentage of the second number. 29 pounds of recyclable trash in a barrel of 53 pounds of trash.
Rus_ich [418]

Divide first number by second number:

29 /53 = 0.54716981

Multiply by 100 to get percent:

0.54716981 x 100 = 54.716981%

Round the answer as needed.

5 0
4 years ago
Please help its due today!<br><br> Please show work
Step2247 [10]

Answer:

Step-by-step explanation:

I didn’t know

3 0
3 years ago
A ball is dropped from a height of 180 meters. The height of the ball can be represented by
Alex Ar [27]
I think it is C but it also could be B as well
6 0
3 years ago
What is the area of a circle with a diameter of 24 meters (use 3.14 for Pi)?
Zarrin [17]

The area of a circle is represented by the equation:


A=\pi r^{2}


We know that the diameter is two times the radius: d=2r


So if we know that the diameter of the circle is 24m, we can divide this by two in order to get the radius:


24m=2r -->r=12m


So then we can plug this radius in to the equation for the area of a circle:


A=\pi (12)^{2}


A=144\pi


We are told to use 3.14 as pi, and not pi itself, so let's plug in 3.14 for pi:


A=3.14(144)


A=452.16m^{2}


Now we know that the area of this circle is 452.16 square meters.

5 0
3 years ago
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