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4 years ago

What is 7/20 written as a decimal

Mathematics

2 answers:

marusya05 [52]4 years ago

7 0

$\frac{7 * 5}{20 * 5} = \frac{35}{100} = 0.35$

Genrish500 [490]4 years ago

3 0

It would be 0.35 because you need to multiply by 5 and then move the decimal 2 spaces to the right.

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Answer:

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Step-by-step explanation:

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3 years ago

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mel-nik [20]

Answer:

8/21

Step-by-step explanation:

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3 years ago

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Evaluate the expression. -38 + 11 a. -27 b. -49 c. 49 d. 27

kiruha [24]

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8 0

3 years ago

I need help on number 18

zloy xaker [14]

Answer:

Volume = 35185.8 $km^{3}$

Step-by-step explanation:

Recall the formula for the volume of a cone: $Volume = \pi R^{2} \frac{h}{3}$

Where R is the radius of the cone's circular base (in your case half of 80 km,(that is 40 km)

And h stands for the height of the cone (in your case 21 km)

We replace such in the formula and calculate its final value:

$Volume = \pi 40^{2} \frac{21}{3} = \pi 1600 \frac{21}{3} = \pi 1600 (7) = 35185.83772...$

We round it to the number of decimals your problem request (let's say to one decimal) and also include the cubic units:

Volume = 35185.8 $km^{3}$

7 0

3 years ago

What is the value of x to the nearest tenth?

Nezavi [6.7K]

Step-by-step explanation:

Hello!!!

Let's workout with this figure.

BC is a chord, O is the centre and OA is the perpendicular bisector.

AB = 1/2 of BC (according to circle's theorem)

so, A B = 1/2 × 25.6

Therefore, the measure of AB is 12.8.

now, let's have a small work with triangle AOB.

as it is a Right angled triangle, taking angle B as refrence angle we get,

p=x

b=12.8

h= OB = 16 (it is also a radius.)

now, 

by Pythagoras relation we get, 

 $p = \sqrt{ {h}^{2} - {b}^{2} }$ 

or, x = root 16^2- 12.8 ^2

by simplification, we get;

the measure of x is 9.6.

Therefore, the value of x is 9.6.

Hope it helps...

8 0

4 years ago