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2 years ago

Which number is irrational?a.) √25b.) √32c.) √49d.) √64

2 answers:

7 0

$\sqrt{25} = 5 \\ \sqrt{49} = 7 \\ \sqrt{64} = 8$
The square root of 32 returns a number which does not end in the decimal. This is the true definition of an irrational number.

marta [7]2 years ago

3 0

I think (B)
~IndexFinger :)

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zhuklara [117]

Answer:

The diameter decreases at a rate of 0.143cm/min when it is of 10 cm.

Step-by-step explanation:

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An snowball has spherical format. The surface area of an sphere is given by:

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In which d is the diameter of the sphere.

In this question:

We need to differentiate S implicitly in function of time. So

$\frac{dS}{dt} = 2d\pi\frac{dd}{dt}$

Surface area decreases at a rate of 9 cm2/min

This means that $\frac{dS}{dt} = -9$

At which the diameter decreases when the diameter is 10 cm?

This is $\frac{dd}{dt}$ when $d = 10$ . So

$\frac{dS}{dt} = 2d\pi\frac{dd}{dt}$

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2 years ago

I need help on this specific equation: 10x+1=3x+9

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Well, first you'd have to get the x by it's self.
10x+1=3x+9
Subtract 3x from each side and you'll have the x on only one side rather than two.
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Now I'd get rid of the 1 on the x's side. So just subtract 1 from each side.
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Then you should make it so the seven isn't there with the x either. Just divide each side by 7.
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Each time you change something on one side, you must do the same to the other side. T find the value of a variable in an equation, simple seclude it so it's on it's own without number to make things confusing.
The answer was x=8/7 btw.

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