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Alex_Xolod [135]
4 years ago
12

Which equation can be used to find 30 percent of 600

Mathematics
1 answer:
agasfer [191]4 years ago
5 0
A/b *100
For example,
30/600.
30/600=0.05
0.05*100=5%
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What is the geometric mean of 7 and 11?
agasfer [191]

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RSB [31]

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3 years ago
The same number is added to both numerator and denominator of the fraction 15/31. If the resulting fraction is 5/6 what is the n
nydimaria [60]

Answer:

the number is 65

Step-by-step explanation:

the same number is added. so let the number be 'x'

the equation can hence be written as:

15 + x / 31 + x = 5 / 6

(now cross multiply)

6 (15 + x) = 5 (31 + x)

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3 0
3 years ago
Assume that the number of sales per day of an app in the apple ios app store is normally distribbuted.
Papessa [141]
You need to know the distribution's mean and standard deviation.

\mathbb P(X>100)=0.20\implies\mathbb P(X\le100)=0.80

Transforming to the standard normal distribution, and letting \sigma denote the standard deviation,

\mathbb P(X\le100)=\mathbb P\left(\dfrac{X-86}\sigma\le\dfrac{100-86}\sigma\right)=0.80

The z-score corresponding to this probability is approximately z=0.8416, so you have

\dfrac{100-86}\sigma=0.8416\implies\sigma=16.64
6 0
3 years ago
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