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3 years ago

What’s the area of this rounded to the nearest one’s place?

Mathematics

2 answers:

Elodia [21]3 years ago

7 0

Answer:

503

Step-by-step explanation:

To find the area of a cirlce it is pi x 2 x the radius squared.

Since,this is a semi-circle you dived by 2 afterwards.

So $\pi x 160 x 2 /2$ is 502.857142857

Round that to the nearest one that is 503 ft squared.

Shkiper50 [21]3 years ago

5 0

Answer:

I think I might be terribly wrong but 160,728 ft

Step-by-step explanation:

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-4.3(9x-2.3)+2.21<br> i dont know the answer to the problem please help

Artyom0805 [142]

Answer:

+10 : (387x + 121

Step-by-step explanation:

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3 years ago

a discount voucher offering 15% off is used to pay a bill. after using the voucher the bill is reduced to 36.72. how much was th

Alexus [3.1K]

The answer is 244.80

You can calculate this by taking 36.72 and dividing it by 0.15 (15%). You would do this because it is the opposite of multiplying an original number by 0.15 (15%) to get 36.72.

Hope It helps!

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4 years ago

Read 2 more answers

Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq

stiv31 [10]

Answer:

Step-by-step explanation:

Remark

This is one of those questions that can throw you. The problem is that do you include the original rectangle or not. The way it is written it sounds like you shouldn't

However if you don't the question gives you 2 complex answers. (answers with the sqrt( - 1) in them.

Solution

Let the width = x

Let the length = x + 5

Area of the rectangle: L * w = x * (x + 5)

Area of the smaller squares (there are 2)

Area = 2*s^2

x = s

Area = 2 * x^2

Area of the larger squares = 2 * (x+5)^2

Total Area

x*(x + 5) + 2x^2 + 2(x + 5)^2 = 120 Expand

x^2 + 5x + 2x^2 + 2(x^2 + 10x + 25) = 120 Remove the brackets

x^2 + 5x + 2x^2 + 2x^2 + 20x + 50 = 120 collect the like terms on the left

5x^2 + 25x + 50 = 120 Subtract 120 from both sides.

5x^2 + 25x - 70 = 0 Divide through by 5

x^2 + 5x - 14 = 0 Factor

(x + 7)(x - 2) = 0 x + 7 has no meaning

x - 2 = 0

x = 2

Perimeter

P = 2*w + 2*L

w = 2

L = 2 + 5

L = 7

P = 2*2 + 2 * 7

P = 4 + 14

P = 18

8 0

3 years ago

A decibel is a logarithmic unit that can be used to measure the intensity of a sound. The function y = 10logx gives the intensit

Anna007 [38]

Answer:

The sound intensity of a whisper is 333.3 times the reference intensity

Step-by-step explanation:

Given : The function $y = 10logx$ gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity.