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dalvyx [7]
2 years ago
5

Please help me with my hw thank you so much

Mathematics
1 answer:
Yuri [45]2 years ago
8 0

Answer: d

Step-by-step explanation:

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the area of a circle is 28pi cm^2. find the area of a circle with a radius half the length of the original circle.
Verdich [7]

Answer:

The area of circle with radius half of original circle is 7 π  cm² .

Step-by-step explanation:

Given as :

The Area of original circle = 28 π square centimeter

Let The radius of original circle  = R

Let The area of circle with radius half of original circle = A square centimeters

Let The radius of circle with radius half of original circle = R'

Now, According to question

∵ Area of original circle =  π × radius²

So, 28 π cm² = π × R²

Or, R² = \frac{28\times \Pi }{\Pi }

Or, R² = 28 cm²

∴  R = \sqrt{28} cm

i.e R = 2 \sqrt{7} cm

So, The radius of original circle = R =  2 \sqrt{7} cm

<u>Again</u>

∵ The radius of circle with radius half of original circle = R'

So, R' = \dfrac{R}{2}

i.e  R' = \frac{2\sqrt{7}}{2}

∴  R' =  \sqrt{7} cm

So, The area of circle with radius half of original circle =  π × R'²

i.e A = π × R'²

Or, A = π ×(\sqrt{7}) ²

or, A =  π × 7

So, The area of circle with radius half of original circle = 7 π  cm²

Hence The area of circle with radius half of original circle is 7 π  cm² . Answer

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3 years ago
Sqrt= Square Root
Marrrta [24]
The answer to this question is <span>C. The student did not evaluate sqrt 16 and sqrt 25 before estimating sqrt 18.</span> The square roots of 16 and 25 are 4 and 5 respectively. He should have esimated that sqrt(18) is close to 4.2 instead of 17.
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3 years ago
Answer this question plsss!!
alukav5142 [94]
3 is the answer. I hope I helped you. Brainliest is appreciated.
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2 years ago
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The sets F and H are given below.
Vinil7 [7]

Answer:

  F ∪ H = {c, d, e, f, g, h}

  F ∩ H = { }

Step-by-step explanation:

The union is the list of elements that are in either of the two sets.

  F ∪ H = {c, d, e, f, g, h}

The intersection is the list of only those elements that appear in both sets. (There are none.)

  F ∩ H = { } . . . . the empty set

4 0
3 years ago
Which expression represents this word phrase? seven less than the quotient of x and 9
KIM [24]
Required expression is x/9 - 7
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2 years ago
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