1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rama09 [41]
3 years ago
12

A 20" pizza was cut into 8 equal slices. 20" is the diameter. What is the area of two pizza slices?

Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0

Answer:

its 160 because 20 x 8 equals 160

Step-by-step explanation:

Anettt [7]3 years ago
6 0

we know the diameter of the pizza is 20", that means the radius of it is half that or 10".

\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=10 \end{cases}\implies A=\pi 10^2\implies A=100\pi \\\\\\ \stackrel{\textit{ divided by 8}}{\cfrac{100\pi }{8}\implies \cfrac{25\pi }{2}}\qquad \qquad \stackrel{\textit{how much for two slices of that?}}{\cfrac{25\pi }{2}+\cfrac{25\pi }{2}\implies \cfrac{50\pi }{2}}\qquad \approx \qquad 78.54

You might be interested in
A tank with a capacity of 1000 L is full of a mixture of water and chlorine with a concentration of 0.02 g of chlorine per liter
faltersainse [42]

At the start, the tank contains

(0.02 g/L) * (1000 L) = 20 g

of chlorine. Let <em>c</em> (<em>t</em> ) denote the amount of chlorine (in grams) in the tank at time <em>t </em>.

Pure water is pumped into the tank, so no chlorine is flowing into it, but is flowing out at a rate of

(<em>c</em> (<em>t</em> )/(1000 + (10 - 25)<em>t</em> ) g/L) * (25 L/s) = 5<em>c</em> (<em>t</em> ) /(200 - 3<em>t</em> ) g/s

In case it's unclear why this is the case:

The amount of liquid in the tank at the start is 1000 L. If water is pumped in at a rate of 10 L/s, then after <em>t</em> s there will be (1000 + 10<em>t</em> ) L of liquid in the tank. But we're also removing 25 L from the tank per second, so there is a net "gain" of 10 - 25 = -15 L of liquid each second. So the volume of liquid in the tank at time <em>t</em> is (1000 - 15<em>t </em>) L. Then the concentration of chlorine per unit volume is <em>c</em> (<em>t</em> ) divided by this volume.

So the amount of chlorine in the tank changes according to

\dfrac{\mathrm dc(t)}{\mathrm dt}=-\dfrac{5c(t)}{200-3t}

which is a linear equation. Move the non-derivative term to the left, then multiply both sides by the integrating factor 1/(200 - 5<em>t</em> )^(5/3), then integrate both sides to solve for <em>c</em> (<em>t</em> ):

\dfrac{\mathrm dc(t)}{\mathrm dt}+\dfrac{5c(t)}{200-3t}=0

\dfrac1{(200-3t)^{5/3}}\dfrac{\mathrm dc(t)}{\mathrm dt}+\dfrac{5c(t)}{(200-3t)^{8/3}}=0

\dfrac{\mathrm d}{\mathrm dt}\left[\dfrac{c(t)}{(200-3t)^{5/3}}\right]=0

\dfrac{c(t)}{(200-3t)^{5/3}}=C

c(t)=C(200-3t)^{5/3}

There are 20 g of chlorine at the start, so <em>c</em> (0) = 20. Use this to solve for <em>C</em> :

20=C(200)^{5/3}\implies C=\dfrac1{200\cdot5^{1/3}}

\implies\boxed{c(t)=\dfrac1{200}\sqrt[3]{\dfrac{(200-3t)^5}5}}

7 0
3 years ago
Is 0.75 greater than 0.100?
Naya [18.7K]
Yes because you only need to look at the first decimal for problems like these and the first number you see a seven and a one and seven is greater than one
8 0
3 years ago
Value of peters house has risen 20% a year for the last three years. If the value of peters home three years ago was $120 thousa
notka56 [123]

Answer:

The value now = $207,360

Step-by-step explanation:

Rate of increase = 20% per year = 20/100 = 0.2 per year

value 3 years ago = $120,000

interest at year 1:

20% of 120,000

= 0.2 × 120,000 = 24,000

Value at the end of year 1

= initial value + interest

= 120,000 + 24,000 = $144,000

In year 2:

20% of 144,000

= 0.2 × 144,000 = 28,800

Value at the end of year 2:

144,000 + 28,800 = $172,800

In year 3

0.2 × 172,800 = 34,560

Value at the end of year 3:

34,560 + 172,800 = $207,360

8 0
3 years ago
Number of comments got maxed out so here's another post.
suter [353]
That’s cool. i need p01nts so imma comment
7 0
3 years ago
Pls answer quickly :)
baherus [9]

Answer:

median=mode

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • HELP QUICKLY PLEASE!!!!!!!!!!!!!
    6·1 answer
  • Order the following sets of numbers from least to greatest 2.1 notation bar,-2.1,2 1/11,-2
    6·1 answer
  • Which of these numbers is a MULTIPLE of 24?
    12·1 answer
  • 30 points!! Help please!! Will give Brainliest!!!
    14·1 answer
  • The scale for a model house is 1:12
    15·2 answers
  • 10. Sevi wants to save to buy a guitar. The guitar costs $900. Sevi has $150 3 points
    5·1 answer
  • The quotient of two negative integers results in an integer. How does the value of the quotient compared the value of the origin
    7·1 answer
  • I need help finding the slope G and J
    12·1 answer
  • A class consists of 1/2 freshmen, 1/8 sophomores, and 1/8 juniors; the rest are seniors. What fraction of the class is seniors?
    14·1 answer
  • 4/5(21/4+51/2)-2/5÷1/5<br>​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!