All categories

3 years ago

I need help on my math I'm in K12

Mathematics

1 answer:

postnew [5]3 years ago

4 0

What do you need help with

You might be interested in

Thx for all the help yall's help

mina [271]

Follow the link above.

3 0

3 years ago

Read 2 more answers

An open-top box with a square base is to have a volume of 4 cubic feet. Find the dimensions of the box (in ft) that can be made

Lemur [1.5K]

Answer:

The dimension of box= $2ft\times 2ft\times 1ft$

Step-by-step explanation:

We are given that

Volume of box=4 cubic feet

Let x be the side of square base and h be the height of box

Volume of box= $lbh=x^2h$

$4=x^2h$

$h=\frac{4}{x^2}$

Now, surface area of box,A= $x^2+4xh$

$A=x^2+4x(\frac{4}{x^2})=x^2+\frac{16}{x}$

$\frac{dA}{dx}=2x-\frac{16}{x^2}$

$\frac{dA}{dx}=0$

$2x-\frac{16}{x^2}=0$

$2x=\frac{16}{x^2}$

$x^3=8$

$x=2$

$\frac{d^2A}{dx^2}=2+\frac{32}{x^3}$

Substitute x=2

$\frac{d^2A}{dx^2}=2+\frac{32}{2^3}=2+4=6>0$

Hence, the area of box is minimum at x=2

Therefore, side of square base,x=2 ft

Height of box,h= $\frac{4}{2^2}=1 ft$

Hence, the dimension of box= $2ft\times 2ft\times 1ft$

5 0

2 years ago

7f=49 i need help fasttttttttt

malfutka [58]

Answer:

f = 7

Step-by-step explanation:

7f = 49

Divide each side by 7

f = 7

7 0

3 years ago

Read 2 more answers

With one<br> do I pick<br> the right on e

katen-ka-za [31]

The answer is

B) 2n - 5

because it's -5 than twice the width (2n)

8 0

3 years ago

9. PART A: Which of the following best summarizes

ivanzaharov [21]

Answer:

D Stanton encourages the audience to spread the word for their cause

Step-by-step explanation:

I just know I have done the test and it makes the most sense. :)

3 0

3 years ago