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3 years ago

13

A 12-ft-by-15-ft rectangular swimming pool has a 3-ft-wide no-slip surface around it. What is the outer perimeter of the no slip

surface

1 answer:

Nataliya [291]3 years ago

7 0

Answer: 74 ft
12+12+15+15= 74
Perimeter is the distance around sometime

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Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in t

Tresset [83]

Answer: The volume of largest rectangular box is 4.5 units.

Step-by-step explanation:

Since we have given that

Volume = $xyz$

with subject to $x+2y+3z=9$

So, let $z=\dfrac{9-x-2y}{3}$

So, Volume becomes,

$V=xyz\\\\V=xy(\dfrac{9-x-2y}{3})\\\\V=\dfrac{9xy-x^2y-2xy^2}{3}$

Partially derivative wrt x and y we get that

$9-2x-2y=0\implies 2x+2y=9\\\\and\\\\9-x-4y=0\implies x+4y=9$

By solving these two equations, we get that

$x=3,y=\dfrac{3}{2}$

So, $z=\dfrac{9-x-2y}{3}=\dfrac{9-3-3}{3}=\dfrac{3}{3}=1$

So, Volume of largest rectangular box would be

$xyz=3\times \dfrac{3}{2}\times 1=\dfrac{9}{2}=4.5$

Hence, the volume of largest rectangular box is 4.5 units.

4 0

3 years ago

Pleaseee i need help!! and the working!

zaharov [31]

Hey! $1.96 x £25,000 = $49,000
Then to change it back you:
$49,000 divided by 1.75 = £28,000

6 0

3 years ago

Read the following poem:

pentagon [3]

Answer:

7, I believe. I have to fill in the extra character space, so I hope you have a nice day :)

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2 years ago

A pie can be cut into more than seven pieces by making four diameter cuts.

n200080 [17]

I'm pretty sure it's true

7 0

2 years ago

Read 2 more answers

Which congruency theorem can be used to prove

irina1246 [14]

Answer:

SAS

Step-by-step explanation:

Given: Two triangles ΔABD and ΔDCA,

We have, AD=AD (normal)

∠A=∠A (Given)

BA=CD (Sides inverse to rise to points are consistently equivalent)

With the SAS rule of congruency,

ΔABD≅ΔDCA

Brainliest?

4 0

2 years ago