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3 years ago

Surface area of a half pipe if it is 7m

Mathematics

2 answers:

Monica [59]3 years ago

7 0

Answer:

Radius = 2.5 m Length = 7 m Half cylinder formula- ½ (pi r^2) + (2 pi R h) Pi x 2.5^2 + 2 x pi x 2.5 x 7

129.5906969 x .5 = 64.795348 m^2 The surface area of the half pipe is 65 m^2.

zloy xaker [14]3 years ago

6 0

Answer:

Step-by-step explanation:

You do not have a complete question. I do not know the dimensions of the half pipe nor the deck. I will assign letters to these. Hopefully that will help.

R = radius of the pipe

L = length of the pipe

W = width of deck

l = length of deck

area of the half pipe is the circumference of the pipe times its length.

Area-half-pipe = pi * R * L

Area of the deck = W * l

If the two decks have the same dimensions then double this number and add them up.

If the half-pipe has a flat cover its area is 2*R*L

Then add all these up.

Hope this helps.

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This year, you owed $6,414.95 in federal income tax. if you are taxed at a net rate of 17%, what was your taxable income for thi

nydimaria [60]

The taxable income for this year will be $37,735. Then the correct option is D.

<h3>What is the percentage?</h3>

The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.

This year, you owed $6,414.95 in federal income tax.

If you are taxed at a net rate of 17%.

Then the taxable income for this year will be given by

$\rm Taxable\ income = \dfrac{6414.96}{0.17}\\\\Taxable\ income = 37735.05 \approx 37735$

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3 years ago

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Please help me with questions 18 and 19

pshichka [43]

18) answer is A: Reflect across the line y = -3. This is the horizontal line that cuts the trapezoid in half, forming a mirror image so to speak.

--------------------------------------------------------------

19)

Answer is choice A) 2
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3 years ago

The length of a rectangular mural is 2ft. more than three times the width the area is 165 sq. ft. Find the Width And Length

olga nikolaevna [1]

We know that the formula for the area of a rectangle is:

$A=lw$

We know that the area is 165. Now we need to solve for the dimensions.

Let the width of the rectangle be " $x$ "

Then the length of the rectangle is $3x+2$

Substitute.

$(3x+2)(x)=156$

Multiply the terms.

$3x^2+2x=156$

Bring the 156 over.

$3x^2+2x-156=0$

We have to use the quadratic formula to solve this now. Let us restate it:

$x= \frac{-b± \sqrt{b^2-4ac} }{2a}$

Now I'm going to fast forward this because all the rest is boring stuff and substitution. The answer is:

$\frac{ \sqrt{469}-1 }{3}$

Since we cannot have a negative answer, we must cancel out the other answer, which I did not include.

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4 years ago

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stealth61 [152]

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3 years ago

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Digiron [165]

Answer:

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4 years ago