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2 years ago

I need help on this question

Mathematics

1 answer:

Irina18 [472]2 years ago

7 0

To find the surface area of the figure , we need to add the surface area of all the faces

So the surface area of figure = Area of two lateral rectangular faces + Area of two triangular faces + area of base

hence

Surface Area of figure = 2(10*15) + 2( 1/2 * 8 * 12) + (12*15)

= 300 + 96 + 180

= 576 square feet

So correct option is the last one

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2 years ago

The weight of water is 62 1/2 per cubic feet. Water that weighs 325 lbs will fill how many cubic feet

yulyashka [42]

Water that weighs 325 lbs will fill 5.2 cubic feet.

Step-by-step explanation:

This is a simple question of cross multiplication

DATA:

1. The weight of water for 1 cubic feet is 62.5

2. The weight of water for 'X' cubic feet is 325

3. To find x, form an equation:

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1 : 62.5

X : 325

4. Cross multiply

X x 62.5 = 1 x 325

62.5X = 325

5. Make X the subject

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3 years ago

Jobisdone [24]

Remember for any two polygons

Area of polygons is directly proportional to square of sides

BC²/XY²=135/15
15²/XY²=9
(15/3)²=XY²
XY=5in

#35

HJ²/XY²=168/378
8²/XY²=0.44
XY²=64/0.44
XY²=145.45
XY\approx 12+

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1 year ago

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Cos(0.5)+cos(0.5+2(3.14159265))+cos(0.5+4(3.14159265))

aleksandr82 [10.1K]

Answer:

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Step-by-step explanation:

First, note that 3.1415... is p, so 2(3.1415...) is 2pi and 4(3.1415...) is 4pi.

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I hope this helps! :)

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2 years ago

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