What is the experimental probability that Dan will roll a number 3 the next time he rolls the number cube?

1 answer:

4 0

The experimental probability changes every time he rolls the die but if its just the next roll he has a 1/6 chance of getting a 3

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It takes Emily eight hours to paint her house. Mike can paint the same area in nine hours. Find how long it would take them if t

emmasim [6.3K]

It will take them 4.24 hours together to paint the area together

Step-by-step explanation:

If Emily takes eight hours to paint the area then she will paint 1/8 of the house in one hour

Similarly, if Mike can paint the same area in 9 hours, then he will paint 1/9 of the same area

Let x be the number of hours in which they will together paint the area.

If x hours are taken by them to paint the area then 1/x of the area will be painted in one hour

So,

$\frac{1}{8}+\frac{1}{9}=\frac{1}{x}\\Multiplying\ both\ sides\ with\ the\ LCM\\72x\\(72x)*\frac{1}{8}+(72x)*\frac{1}{9}=72x * \frac{1}{x}\\9x+8x=72\\17x=72\\Dividing\ both\ sides\ by\ 17\\\frac{17x}{17}=\frac{72}{17}\\x=4.24\ hours$

It will take them 4.24 hours together to paint the area together

Keywords: Linear equation, Variables

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4 0

3 years ago

Read 2 more answers

The goal of this problem is to use the definition of the derivative to find ah + b where a and b are constants. find these const

Bond [772]

Ah is derived from h^2. it's derivative is 2h^2-1, thus the constant a = 2

b is derived from bh. where it's derivative is h^1-1, thus the constant b = 1

7 0

4 years ago

The volume of a cylinder is 252π252π cm3 and its height is 7 cm.

kirill [66]

V = (pi) * r^2 * h
h = 7
V = 252(pi)

252(pi) = r^2 * 7
252(pi) / 7 = r^2
36(pi) = r^2
sqrt 36(pi) = r
6 = r <==== radius is 6 cm

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3 years ago

Help on this one question please!!

Mandarinka [93]

The correct answer is B.)

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3 years ago

How do you solve 24 divided by 3/8?

ICE Princess25 [194]

24/1 divided by 3/8 would be 64. That can be found by finding the reciprocal (inverse) of the second fraction, multiplying the numerators and denominators to get 192/3. Then to simplify, you can divide both numerator and denominator by 3 to get 64/1 or 64. Hope that helps!

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3 years ago