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3 years ago

11

A jar has five red marbles and 10 blue ones if you were to pick a random marble without replacing it and then select another wha

t is the fractional probability of getting to red

1 answer:

Andrej [43]3 years ago

4 0

I think the correct answer is 10/15.

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A sector of a circle makes a 127° angle at its centre. If the arc of the sector has length 36 mm, find

Veseljchak [2.6K]

Answer:

Approximately $68.5\; \rm mm$ .

Step-by-step explanation:

Convert the angle of this sector to radians:

$\begin{aligned}\theta &= 127^{\circ} \\ &= 127^{\circ} \times \frac{2\pi}{360^{\circ}} \\ &\approx 2.22\end{aligned}$ .

The formula $s = r\, \theta$ relates the arc length $s$ of a sector of angle $\theta$ (in radians) to the radius $r$ of this sector.

In this question, it is given that the arc length of this sector is $s = 36\; \rm mm$ . It was found that $\theta = 2.22$ radians. Rearrange the equation $s = r\, \theta$ to find the radius $r$ of this sector:

$\begin{aligned} r&= \frac{s}{\theta} \\ &\approx \frac{36\; \rm mm}{2.22} \\ &\approx 16.2\; \rm mm\end{aligned}$ .

The perimeter of this sector would be:

$\begin{aligned}& 2\, r + s \\ =\; & 2 \times 16.2\; {\rm mm} + 36\; {\rm mm} \\ =\; & 68.5\; \rm mm\end{aligned}$ .

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2 years ago

Help help help ASAP math math

Lorico [155]

29 mg = 0.029 g hope this helps

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2 years ago

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Subtract 5a-6b+7c from 13a-4b+8c

schepotkina [342]

Answer:

im not sure but i think the anwser is its self dont take my anwser its garbadge

Step-by-step explanation:

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2 years ago

MrRa [10]

false... even if you got 100 on the next test, you would only have an 84 average

Hope this helped!!! :) (comment if you don't understand)

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3 years ago

A certain pet store sells only dogs and cats. In

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They sold 300 dogs and 200 cats

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