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3 years ago

Which ratio can form a proportion with 4/8

Mathematics

2 answers:

Goshia [24]3 years ago

5 0

Answer:

The Answer is 14/7

Step-by-step explanation:

4 x 14 = 56

7 x 8 = 56

Why?:

Because when doing the two top numbers and bottom numbers are multiplied together you should end up with the SAME answer for both to create a proportion.

photoshop1234 [79]3 years ago

3 0

The answer will be 1/2

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3 years ago

The size of the angle of a triangle are are in the ratio 2:4:9 calculate the size of the three angles in degree

solmaris [256]

Total Unit of Triangle = 2+4+9 = 15
Value of one unit = 180/15 = 12

So, Angles = 2(12) : 4(12) : 9(12) = 24 : 48 : 108

In short, Your Angles would be: 24, 48 & 108

Hope this helps!

3 0

3 years ago

The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric

Papessa [141]

Let $X$ denote the number of minutes spent brushing his teeth, and let $\mu$ be the mean and $\sigma$ the standard deviation for this distribution.

$\mathbb P(X$

The z-score corresponding to this probability is approximately $z=-0.2533$ , which means

$\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1$

Next, (note the sign change)

$\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98$

The corresponding z-score is approximately $z=2.0538$ , so you have

$\dfrac{2-\mu}\sigma=2.0538\iff\mu+2.0538\sigma=2$

Solving the two equations for $\mu$ and $\sigma$ , you'll find that the mean is approximately $\mu=1.1098$ and the standard deviation is approximately $\sigma=0.4334$ .

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3 years ago