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3 years ago

HELP ME PLEASE I NEED THIS FAST---------Find the surface area of the triangular prism. and the equation

Mathematics

2 answers:

Nataly [62]3 years ago

5 0

It’s C lmk if it’s right

Ainat [17]3 years ago

4 0

It’s C, I got this because if you add it all together you get c.

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What is the value of 5 over 6 divided by 3 over 4

Kisachek [45]

Answer:

10/9

Step-by-step explanation:

5/6 ÷ 3/4 =
5/6 × 4/3 =
20/18 =
10/9

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3 years ago

In a class of 6, there are 2 students who forgot their lunch.

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3 years ago

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Hope this helps

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4 years ago

200 people were asked to name their favourite sport.

grin007 [14]

Answer:

5% but not sure

Step-by-step explanation:

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3 years ago

Solve this to pretty pretty pls

earnstyle [38]

Answer:

3) 161

Step-by-step explanation:

Indeed this is pretty easy :D

What we need to find is the surface area of the rectangular prism excluding the area of the hole. First, let's find out the width of the box, we can do this by using the area, the length, and the height, and we can write:

$V=lhw$

(Formula to find the volume of a rectangular prism)

$140=(4)(7)w\\ 140=28w\\ 5=w$

Now that we have the width, can find the area of the top part of the prism:

$(5)(4)=20$

The area of the top part of the prism is 20, and the circle has 1/4 of the area of that:

$A_{circle} = \frac{A_{top part} }{4}\\ A_{circle} = \frac{20}{4} \\ A_{circle} = 5$

So the area of the circle is 5. Now we just need to find the surface area of the rectangular prism and subtract that result with the area of the circle:

$A_{circle}=5\\ SA_{rec.pri.}=2(lh+lw+wh)\\ SA_{rec.pri.}=2((4)(7)+(4)(5)+(5)(7))\\ SA_{rec.pri.}=2(28+20+35)\\ SA_{rec.pri.}=2(83)\\ SA_{rec.pri.}=166$

Subtract these two results...:

$166-5=161$

And we are done!

3 0

2 years ago