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3 years ago

HELP!

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:

Step-by-step explanation:

Since we have given that

Quadrant with radius 16 inches and angle 90° .

Since there are two quadrants:

So, Perimeter of quadrants is given by

Perimeter of this figure is given by

Hence, Second Option is correct.

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I need help finding the mean

gogolik [260]

Answer:

the mean is 10

Step-by-step explanation:

if you add them all up (50) then divide it by how many months (5) you get 10

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4 years ago

What is the quotient of 20 divided by one fourth

WITCHER [35]

Answer:

Step-by-step explanation:

20 ÷ 1/4 is the same as 20 x 4 because when dividing with fraction you must change division to multiplication and take the reciprocal of the second fraction

therefore, answer is 80

5 0

3 years ago

Read 2 more answers

Help me it’s urgent

Ket [755]

Answer:

$a_1 = -\dfrac{3}{4}$

Step-by-step explanation:

$a_1 \times r = a_2$

$a_1 \times r^2 = a_3$

$a_1 \times r^3 = a_4$

...

$a_1 \times r^8 = a_9$

$\dfrac{a_9}{a_4} = \dfrac{a_1 \times r^8}{a_1 \times r^3} = \dfrac{-196}{6}$

$r^5 = -32$

$r = -2$

$a_1 \times r^3 = a_4$

$a_1 \times (-2)^3 = 6$

$a_1 = \dfrac{6}{-8}$

$a_1 = -\dfrac{3}{4}$

3 0

4 years ago

4. A scientist changes the temperature of a solution at a rate of -7°C per minute. How many minutes will it take for

igomit [66]

Answer:

7 minutes

Step-by-step explanation:

The scientist changes the temperature for the solution at a rate of -7°C per minute. We need to find out how long it'll take for the solution's temperature to change from 0°C to -49°C. So, we divide -7 by -49 to find out how long it will take:

-49 / -7 = 7

It will take 7 minutes for the temperature to reach -49°C.

6 0

3 years ago

Two friends compete with each other and five other, equally good, violinists for first and second chair in an orchestra, in a bl

Darina [25.2K]

Answer: 0.0476

Step-by-step explanation:

Given : Two friends and 5 other people compete with each other for first and second chair in an orchestra.

Total people in this competition= 2+5=7

By permutation , Number of ways to arrange 7 people= 7!

Also, number of ways for two friends end up as first and second chair together= 2 × 5! [ 2 ways to arrange friends on first and second chair and 5! ways to arrange others]

I.e. Required probability = $\dfrac{2\times5!}{7!}$

$=\dfrac{2!\times5!}{7\times6\times5!}\\\\=\dfrac{1}{7\times3}\\\\=\dfrac{1}{21}\\\\=0.0476$

Hence, the probability that the two friends end up as first and second chair together = 0.0476

4 0

4 years ago