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
Ymorist [56]
3 years ago
5

Find the area of a circle with a diameter of 8m in terms of pi

Mathematics
1 answer:
tekilochka [14]3 years ago
5 0

Answer:

16π

Step-by-step explanation:

Area of a circle = πr²

8/2 = 4

Then you plug in 4 in to the formula above.

Have a great day :)

You might be interested in
find the equations of the tangents to the curve y= x(x-1)(x+2) at the points where the curve cuts the x axis
antoniya [11.8K]

First of all, we compute the points of interest, i.e. the points where the curve cuts the x axis: since the expression is already factored, we have

x(x-1)(x+2) = 0 \iff x=0\ \lor\ x-1=0\ \lor\ x+2=0

Which means that the roots are

x=0\ \lor\ x=1\ \lor\ x=-2

Next, we can expand the function definition:

y = x(x-1)(x+2) = x^3 + x^2 - 2x

In this form, it is much easier to compute the derivative:

y' = 3x^2+2x-2

If we evaluate the derivative in the points of interest, we have

y'(-2) = 6,\quad y'(0)=-2,\quad y'(1)=3

This means that we are looking for the equations of three lines, of which we know a point and the slope. The equation

y-y_0=m(x-x_0)

is what we need. The three lines are:

y-0=6(x+2) \iff y = 6x+12  This is the tangent at x = -2

y-0=-2(x-0) \iff y = -2x  This is the tangent at x = 0

y-0=3(x-1) \iff y = 3x-3  This is the tangent at x = 1

7 0
3 years ago
The weights of red delicious apples are approximately normally distributed with a mean of 9 Ounces and a standard deviation of 0
Simora [160]

Answer:

The mean of W is 55 ounces.

The standard deviation of W is 4.33 ounces.

Step-by-step explanation:

Let X: weight of a red delicious apple, and B: the weight of the box and packing material.

The distribution that will represent W: the total weight of the packaged 5 randomly selected apples will be also normally distributed.

Applying the property of the mean: E(aX)=aE(X), the mean of W will be:

\mu_W=E(W)=E(5X+B)=5E(X)+E(B)=5*9+10=45+10=55

Applying the property of the variance: V(aX+b)=a^2V(X), the variance of W will be:

\sigma^2_W=V(W)=V(5X+B)=5^2V(X)+V(B)=25*0.75+0=18.75

The mean standard deviation of W will be the squared root of V(W):

\sigma_W=\sqrt{V(W)}=\sqrt{18.75}=4.33

The mean of W is 55 ounces.

The standard deviation of W is 4.33 ounces.

3 0
3 years ago
Coffee beans are packaged in 50 kg cartons with an allowable error of 0.7% What is the acceptable weight range for a carton of c
goldfiish [28.3K]
0.35, you multiply 50 times 0.7%
6 0
3 years ago
Read 2 more answers
Convert 0.34% into a decimal
WINSTONCH [101]
0.0034, This should be the decimal
7 0
3 years ago
Read 2 more answers
Create a factorable polynomial with a GCF of 2y. Rewrite that polynomial in two other equivalent forms. Explain how each form wa
Varvara68 [4.7K]
4y^1 + 6y^3...so factor out the GCF for another form

2y(2 + 3y^2) <== here is one form

another form would be to multiply ur equation by a multiple of ur GCF 2, such as 4

4(4y^1 + 6y^3) = 16y^1 + 24y^3 <== another form
6 0
3 years ago
Other questions:
  • Find the distance between the following coordinates: I(-a,b), J(a,b)
    15·1 answer
  • Sam has 79 model cars. He wants to give them to 4 of his friends. He wants each friend to have an equal number of cars. How many
    7·2 answers
  • K.Brew sells a wide variety of outdoor equipment and clothing. The company sells both through mail order and via the internet. R
    6·1 answer
  • What is 5.6 minus 4.8
    15·1 answer
  • Which equation is equivalent to the given equation?<br> X^2-14x=-48
    10·1 answer
  • There are 5 roses in a vaise of 14 flowers. The rest are daisies. (What is the ratio of daisies to roses)​
    8·1 answer
  • Answer must be in fraction form
    9·1 answer
  • The first time Lori played a game, she scored 100 points. She doubled her previous score each of the next 3 times she played the
    14·1 answer
  • Please help I don't know how to do this I am confused
    14·1 answer
  • Show all the stepsx: 3, 9, 13, 20y: 9, 27, 39, 60State whether the relationship between the variables in the table is a direct v
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!