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dmitriy555 [2]
2 years ago
12

Please help me , at least do one and explain it please .

Mathematics
1 answer:
Len [333]2 years ago
7 0

9514 1404 393

Answer:

  1. 113.0 cm²
  2. 2464.0 in²
  3. 95.0 ft²

Step-by-step explanation:

1. The area of a circle is given by the formula ...

  A = πr² . . . . . where r is the radius

The radius is shown as 6 cm, so the area is ...

  A = (3.14)(6 cm)² = 113.0 cm²

__

2. The radius is shown as 28 in. We note that this is a number divisible by 7, so we choose 22/7 for π.

  A = (22/7)(28 in)² = 2464 in² . . . . see comment

__

3. The radius is half the diameter, so is 11/2 = 5.5 ft. Then the area is ...

  A = (3.14)(5.5 ft)² = 95.0 ft²

_____

<em>Additional comment</em>

If you use a more exact value of π for problem 2, the area is 2463.0 in². If you use 3.14 as the value of π, the area rounds to 2461.8 in². For these values of pi (3.14 or 22/7), the answer is only good to about 3 significant digits. 2464 has more significant digits, so digits beyond the first 3 may be in error.

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Answer:

The equation is \frac{x}{y}= 8

Step-by-step explanation:

Let the time for which i bike is = x hours

Let the distance traveled in x hours = y miles

Ratio of distance and time will be = x : y

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then the ratio of distance and time will be same in both the cases

So equation will be

\frac{x}{y} =\frac{14}{112}\\\\\frac{x}{y} =8

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gayaneshka [121]

Answer:

0.13 ft/min

Step-by-step explanation:

We are given that

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Let d be the diameter of pile

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Answer:

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Step-by-step explanation:

<h3>Factorize the Expressions</h3>

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30 {x}^{2}  {y}^{7} z = 2 \times 3 \times 5 \times x \times x \times y \times y \times y \times y \times y \times y \times y \times z

<h3>Factor out the Common Factors</h3>

gcf = 3 \times 5 \times x \times y \times y \times y \times y \times y \times y \times y \times z

<h3>Multiply the Common Factors</h3>

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Answer:

\Large \boxed{\sf A}

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\displaystyle 2x\sqrt{44x}-2\sqrt{11x^3}

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The expression is option A

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