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
frozen [14]
3 years ago
9

Help me with my math homework please.

Mathematics
1 answer:
MariettaO [177]3 years ago
5 0

Answer:

look around the bottom of the page and if it has something like a brand or company whatever write it down in the search and then write the title of the paper and look for pdfs

You might be interested in
A metal cylinder can with an open top and closed bottom is to have volume 4 cubic feet. Approximate the dimensions that require
Aleksandr-060686 [28]

Answer:

r\approx 1.084\ feet

h\approx 1.084\ feet

\displaystyle A=11.07\ ft^2

Step-by-step explanation:

<u>Optimizing With Derivatives </u>

The procedure to optimize a function (find its maximum or minimum) consists in :

  •  Produce a function which depends on only one variable
  •  Compute the first derivative and set it equal to 0
  •  Find the values for the variable, called critical points
  •  Compute the second derivative
  •  Evaluate the second derivative in the critical points. If it results positive, the critical point is a minimum, if it's negative, the critical point is a maximum

We know a cylinder has a volume of 4 ft^3. The volume of a cylinder is given by

\displaystyle V=\pi r^2h

Equating it to 4

\displaystyle \pi r^2h=4

Let's solve for h

\displaystyle h=\frac{4}{\pi r^2}

A cylinder with an open-top has only one circle as the shape of the lid and has a lateral area computed as a rectangle of height h and base equal to the length of a circle. Thus, the total area of the material to make the cylinder is

\displaystyle A=\pi r^2+2\pi rh

Replacing the formula of h

\displaystyle A=\pi r^2+2\pi r \left (\frac{4}{\pi r^2}\right )

Simplifying

\displaystyle A=\pi r^2+\frac{8}{r}

We have the function of the area in terms of one variable. Now we compute the first derivative and equal it to zero

\displaystyle A'=2\pi r-\frac{8}{r^2}=0

Rearranging

\displaystyle 2\pi r=\frac{8}{r^2}

Solving for r

\displaystyle r^3=\frac{4}{\pi }

\displaystyle r=\sqrt[3]{\frac{4}{\pi }}\approx 1.084\ feet

Computing h

\displaystyle h=\frac{4}{\pi \ r^2}\approx 1.084\ feet

We can see the height and the radius are of the same size. We check if the critical point is a maximum or a minimum by computing the second derivative

\displaystyle A''=2\pi+\frac{16}{r^3}

We can see it will be always positive regardless of the value of r (assumed positive too), so the critical point is a minimum.

The minimum area is

\displaystyle A=\pi(1.084)^2+\frac{8}{1.084}

\boxed{ A=11.07\ ft^2}

8 0
3 years ago
The table below shows all of the possible outcomes of rolling a six-sided number cube and flipping a coin.
exis [7]

maybe bc of how many times you can add the number itself

3 0
3 years ago
Read 2 more answers
Kelly wants to cut her birthday cake into 20 equal pieces. If she uses all of the cake, what is the correct angle she needs to c
klasskru [66]

Answer: Well if i am correct she would be cutting acute angles.

4 0
3 years ago
What is -212+(-102)?​
hram777 [196]

Answer:

-212+(-102) = -212-102

= -314

Hope this helps!

4 0
3 years ago
Read 2 more answers
Use the box method to distribute and simplify (5x – 6)(x^2 – x– 3). Drag and
mina [271]

Answer:

The result will be: 5x³ -11x² -9x + 18

7 0
2 years ago
Other questions:
  • 3 out of every 5 picks are orange. if 12 picks are orange, how many picks in all?
    6·1 answer
  • the circumference of the cylinder is 4cm snf the height 9 cm. What is the curved surface area of the cylinder?
    14·1 answer
  • What is the area of a sector with a central angle of 2π9 radians and a diameter of 20.6 mm? Use 3.14 for π and round your answer
    13·1 answer
  • How to change 7.25% into a decimal?
    14·2 answers
  • a stadium floor that is in the shape of a circle has a diameter with a length of 210 yards which of these measurements is closes
    14·1 answer
  • Math help!! Answers to 7,8,9?
    15·1 answer
  • Question 6<br> The point (-2, 1); is on the graph of which of these functions?
    11·1 answer
  • If there is 80 glasses and i pour 3/4 of water in each glass how many cups did i pour in all
    9·2 answers
  • 3. 3.A) The angles of triangle ABC are in the ratio of 8:3:4. What is the measure of the smallest angle?​
    11·1 answer
  • Find the perimeter and area of the figure. Round to the nearest tenth if necessary.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!