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earnstyle [38]
3 years ago
14

Calcite the area of sphere radius 3 give your answer in 1 decimal place ​

Mathematics
2 answers:
alexgriva [62]3 years ago
5 0

Answer:

113.1 units²

Step-by-step explanation:

Surface area of sphere = 4×pi×r²

= 4 × pi × 3²

= 36pi units²

= 113.0973355 units²

= 113.1 units²

Lisa [10]3 years ago
3 0

Answer: I assume you mean surface area of a sphere.

The formula is 4πr²

If radius=3, then:

4 times \frac{22}{7} times 3²

4 times \frac{22}{7} times 9

= 113.142857

Rounded to 1 decimal place = 113.1

<u>NOTE: In place of π you can also use 3.14.</u>

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    ------
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3 years ago
Please help me don't understand :(
qaws [65]

Answer:

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8 0
3 years ago
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sweet-ann [11.9K]

Answer:

The perimeter and area of the square are 56 units and 196 square units, respectively.

Step-by-step explanation:

The inner right triangle represents a 45-45-90 right triangle, which has the feature of a hypotenuse whose length is \sqrt{2} time the length of any of its legs. If the hypotenuse has a measure of 7\sqrt{2}, then the legs of the triangle have a measure of 7.

Now, we are aware that the side length of the square is twice the length of the leg of the right triangle. Then, side length of the square is 14 units long.

Lastly, we know from Geometry that the perimeter and area of the square are represented by the following expressions:

Perimeter

p = 4\cdot l (1)

Area

A = l^{2} (2)

Where l is the side length of the square.

If we know that l = 14, then the perimeter and area of the square are, respectively:

p = 4\cdot (14)

p = 56

A = 14^{2}

A = 196

The perimeter and area of the square are 56 units and 196 square units, respectively.

7 0
2 years ago
Thallium-210 has a half-life of 1.32 minutes. Find an equation for the percent of Thallium-210 sample that remains after t minut
Lady bird [3.3K]

Answer:

  p(t) = 100%·2^(-t/1.32)

Step-by-step explanation:

The equation for exponential decay is ...

  (remaining amount) = (initial amount)·2^(-t/(half-life))

Here, we can represent the percentage remaining by p(t) and the initial amount by 100%. Then, for a half-life of 1.32 minutes, the amount remaining is ...

  p(t) = 100%·2^(-t/1.32) . . . . . where t is in minutes

_____

Alternate functional forms are possible, such as ...

  p(t) = 100%·e^(-0.525112t)

  p(t) = 100%·0.591489^t

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2 years ago
PLZ help with expression
umka2103 [35]
The last two options are correct, but it looks like you’ve got them :)
6 0
3 years ago
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