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Len [333]
2 years ago
15

can someone explain and answer this for me.... my math final is tomorrow and this is the only thing im confused on​

Mathematics
1 answer:
irakobra [83]2 years ago
8 0

Answer:

  937,381

Step-by-step explanation:

The problem statement explains the exponential formula for the population. It is written in terms of doubling time. You are told what the variables are, and you are given their values. All you need to do is substitute them into the formula and do the arithmetic.

__

  P_0=93000\\t=10\\d=3\\\\P_t=93\;\!000(2^{\frac{10}{3}})\approx93\;\!000\times10.7093684\\\\P_t\approx937\:\!381

The population of the culture after 10 hours is 937,381.

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Elena surveyed her classmates to see how many like to make jewelry. When she asked 20 of her classmates, 50 percent said they li
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10 students of Elena's classmates like to make jewellery.

<u>Step-by-step explanation:</u>

Let total no.of classmates who liked the jewellery = x

Here, in the given problem, given she asked her classmates '20'. So, it clearly shows that total number of students/classmates = 20. Also, in that, 50% said like to make jewellery. Now find 'x' as below,

                    x = 50 \% \text { of } 20

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In the figure below, BD and EC are diameters of circle P. What is the arc measure of ADE in degrees? IMAGE BELOW
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Answer:

The arc measure of ∠ADE is equal to 333 degrees.

Step-by-step explanation:

Please refer to the attached diagram,

Let the unknown angle ∠APE = x

Since BD is the diameter of the circle then

∠APE + ∠DPE + ∠APB = 180°

∠APE + 63° + 90° = 180°

x + 63° + 90° = 180°

Solving for x

x = 180° - 90° - 63°

x = 90° - 63°

x = 27°

Since a circle has 360° then

∠ADE + ∠APE = 360°

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∠ADE = 333°

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Answer:

19.6 cm²

Step-by-step explanation:

If a circle fits perfectly inside of a square, then its diameter is equal to the length of sides of the square.

The area of a circle is given by:

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In this problem, d = 5 cm, the area of the circle is:

A= 3.14 *\frac{5^2}{4} \\A=19.6\ cm^2

The approximate area of the circle is 19.6 cm².

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