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3 years ago

The perimeter of a rectangular field is 38m. It’s width is 7cm.

Mathematics

1 answer:

AveGali [126]3 years ago

4 0

Answer:

12 m

Step-by-step explanation:

perimeter is all of the sides together, so 2 7's and 2 x's. You would subtract 14 from 38 to get 24, then divide it by 2 to get the missing side, which is 12

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In 1980, the number of African elephants was 1,200,000 but that number was decreasing 5.25% a year.

algol13

<span>Answer is about 12.85.</span>

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3 years ago

Please help on this

Gennadij [26K]

Answer:

5.025m

Step-by-step explanation:

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2 years ago

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PIT_PIT [208]

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3 years ago

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Find the circumference of the circle and round to the nearest tenth

Ede4ka [16]

Step-by-step explanation:

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$2\pi \: r$

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3 years ago

How to find r in this equation using combination formula C(8,r)=28<br>

slavikrds [6]

Answer:

r = 2

Step-by-step explanation:

We have the formula of $^nC_r = \frac{n!}{r! (n-r)!}$

Now, it is given that $^8C_r = \frac{8!}{r! (8-r)!} = 28$ ........ (1)

And we have to find the value of r which satisfy the above equation.

So, $r! (8-r)! = \frac{8!}{28} = \frac{40320}{28} = 1440$

Now, we have to use the trial method to find the value of r.

For r = 1, $1! (8-1)! = 7! = 5040 \neq 1440$

Hence, r can not be 1.

Now, put r = 2, $2! (8-2)! = 2 \times 6! = 1440$

Therefore, r = 2 (Answer)

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3 years ago

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