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kvv77 [185]
3 years ago
12

an astronomer wishes to measure on a photograph the distance between the image of a certain star and three star other star image

s nearby, if 8 images are nearby how many choices of the three stars does he have?
Mathematics
1 answer:
Greeley [361]3 years ago
6 0
The astronomer has to choose 3 star images out of 8.This is a problem of combinations. This can be expressed as 8C3 i.e. combination of 8 objects taken 3 at a time.

8C3= \frac{8!}{3!*5!}=56

This means, if 8 images are nearby the astronomer will have 56 choices <span>of the three stars.</span>
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cluponka [151]

Answer:

Step-by-step explanation:

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8 0
3 years ago
Four friends go to an amusement arcade.
galben [10]

<u><em>Answer:</em></u>

<u>The rule is: </u>

T(x) = 8x + 20

<em><u>Explanation:</u></em>

<u>We are given that:</u>

<u>The rule for the amount that one friend pays is:</u>

C(x) = 2x + 5

<u>Now, we know that:</u>

Each of the four friends will pay the entry fee which is $5 per person

The 4 friends will play the same number of games represented by x

<u>This means that:</u>

We can simply get the rule for the total amount to be paid by the four friends (T(x)) by multiplying the amount paid by each friend by 4

<u>This means that:</u>

T(x) = 4 * C(x)

T(x) = 4(2x + 5)

T(x) = 8x + 20

Hope this helps :)

4 0
3 years ago
17. The radius of a circular path is 7m. Find the cost of fencing the path if the cost per meter is Rs.35​
Elis [28]

The cost of fencing the path is Rs 1539.38.

It is required to find the cost of  fencing the path.

<h3>What is circle?</h3>

A circle is a closed two-dimensional figure in which the set of all the points in the plane is equidistant from a given point called “centre”. The perimeter around the circle is known as the circumference.

Given that:

radius of a circular path is 7m.

Rate = Rs .35​ per meter

We know that

Circumference of circle =2\pi r

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Circumference of circle=43.98 m

Now,

Cost = Circumference × Rate

Cost =43.98× 35

Cost =  Rs 1539.38

Therefore, the cost of fencing the path is Rs 1539.38.

Learn more about circle here:

brainly.com/question/11833983

#SPJ1

6 0
1 year ago
7 es un número natural?​
Snezhnost [94]

Answer:

Sí, 7 es un número natural

Step-by-step explanation:

3 0
3 years ago
Reggie has 176 pictures of animals. He wants to keep half and then divide the rest equally among four friends. ... How many pict
FinnZ [79.3K]

Answer:

each friend will get 22

Step-by-step explanation:

so you have 176 you divide that by half and you get 88 so then you divide the other 88 by 4 and you get 22 so Reggie kept 88 and all 4 friends each get 22

4 0
2 years ago
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