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Anna [14]
2 years ago
6

Kenard takes a square piece of cardboard and cuts 4 in. by 4 in. squares out of each corner. He folds the sides up to make a box

without a top. What equation can Kenard use to determine the volume of the box, where x is the side length of the original piece of cardboard? Express the equation in standard form.
v=
Mathematics
1 answer:
Pani-rosa [81]2 years ago
5 0
Each side after the cut-out is (s-2c) where s is the original side length and c is the size of the cut so:

V=hlw, h=x and l and w are both (x-8)

V=x(x-8)(x-8)

V=x(x^2-16x+64)

V=x^3-16x^2+64x
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The rate of change (dP/dt), of the number of people on an ocean beach is modeled by a logistic differential equation. The maximu
Kazeer [188]

Answer:

\frac{dP}{dt} = 2.4P(1 - \frac{P}{1200})

Step-by-step explanation:

The logistic differential equation is as follows:

\frac{dP}{dt} = rP(1 - \frac{P}{K})

In this problem, we have that:

K = 1200, which is the carring capacity of the population, that is, the maximum number of people allowed on the beach.

At 10 A.M., the number of people on the beach is 200 and is increasing at the rate of 400 per hour.

This means that \frac{dP}{dt} = 400 when P = 200. With this, we can find r, that is, the growth rate,

So

\frac{dP}{dt} = rP(1 - \frac{P}{K})

400 = 200r(1 - \frac{200}{1200})

166.67r = 400

r = 2.4

So the differential equation is:

\frac{dP}{dt} = rP(1 - \frac{P}{K})

\frac{dP}{dt} = 2.4P(1 - \frac{P}{1200})

3 0
2 years ago
for his long-distance phone service, Kareem pays a $2 monthly fee plus $0.12 per minute. Last month, Kareem's long-distance bill
beks73 [17]
$13.52-$2=$11.52

11.52 \div 0.12 = 96

Kareem was billed for 96 minutes.

Hope this helps. - M
8 0
3 years ago
Please explain your answer
Ymorist [56]

Answer:

51

Step-by-step explanation:

11+(-7)^2-9 - original

11+49-9 - square the -7, since its in brackets the negative applies too and a negative x a negative = positive, so it ends up as 7x7+49

60-9 - add both positives 11+49=60

51 - subtract 9 from 60, 60-9=51

7 0
2 years ago
If f(x)=-3 then x=___
Romashka-Z-Leto [24]

Answer:

3x

Step-by-step explanation:

6 0
3 years ago
A sphere has a diameter of 10 in. What is the volume of the sphere?
givi [52]

The volume of sphere is \frac{500}{3}\pi inches cubed.

Step-by-step explanation:

Given,

Diameter of sphere = 10 inches

Radius of sphere = \frac{Diameter}{2}=\frac{10}{2}

Radius of sphere = 5 inches

Volume of sphere = \frac{4}{3}\pi r^3

V = \frac{4}{3}\pi (5)^3

V = \frac{4}{3}\pi * 125\\\\V = \frac{500}{3}\pi

The volume of sphere is \frac{500}{3}\pi inches cubed.

Keywords: volume, division

Learn more about division at:

  • brainly.com/question/11306893
  • brainly.com/question/11334714

#LearnwithBrainly

5 0
3 years ago
Read 2 more answers
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