2 years ago

Pls can you solve this question from hegartymaths?

Mathematics

1 answer:

Sergeeva-Olga [200]2 years ago

8 0

The area of a circle with radius r is πr². So you need to find r such that

πr² = 56π

⇒ r² = 56

⇒ r = √56 = 2√14

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Simply the following expression 35 +(-13)+(8)-(-6)

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35 + (-13) + (8) - (-6)

22 + (8) - (-6)

30 - (-6)

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3 years ago

If the population of a particular country is growing at 1.5 % compounded continuously, how long will it take the population to

DIA [1.3K]

$e^{0.015t}=3$
Taking natural logs of both sides, we get
0.015t=ln 3
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The answer is 73.24 years.

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3 years ago

Cynthia conducted an experiment with a spinner that contained only 4 sectors:f,g,h,and j. She spun the arrow 40 times and record

rosijanka [135]

40 total spins

it landed on H 15 times which equals 15/40

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4 years ago

You would burn about 200 calories by walking for 60 minutes. About how many calories would you burn if you walk for 15 minutes?

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(answer ) 50 calories .

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Read 2 more answers

Tina was asked to determine the possible dimensions of a given rectangle whose area is 12a4b3-18a6b3-72a7b3. Tina stated that th

Rufina [12.5K]

Answer:

Tina is correct

Step-by-step explanation:

Given

$Area = 12a^4b^3 - 18a^6b^3 - 72a^7b^3$

Required

State if $3a^4b^3(4-6a^2-24a^3)$ is a possible dimension

To do this, we simply expand $3a^4b^3(4-6a^2-24a^3)$

$3a^4b^3(4-6a^2-24a^3)$

$3a^4b^3 * 4-3a^4b^3 * 6a^2-3a^4b^3 * 24a^3$

$12a^4b^3 - 18a^{4+2}b^3 * -72a^{4+3}b^3$

$12a^4b^3 - 18a^{6}b^3 * -72a^{7}b^3$

By comparison, the result of the expansion

$12a^4b^3 - 18a^{6}b^3 * -72a^{7}b^3$

and the given expression

$Area = 12a^4b^3 - 18a^6b^3 - 72a^7b^3$

are the same.

<em>Hence, Tina is correct</em>

7 0

3 years ago