Treat it like a fraction
18b^2/45b
divide top and bottom by b
18b/45
divide top and bottom by 3
6b/15
divide top and bottom by 3 again
2b/5
2b:5 is the simpliest form of the ratio

7 0

4 years ago

Karin uses a probability simulator to pull colored pencils from a bag 60 times and to flip a coin 60 times. The results are show

Oxana [17]

35/60 this is my answer.

8 0

3 years ago

Write a number that is gratet than 1 in scientific notation explain how you knowit is grater than 1

sweet [91]

2 x 10^2 because 2 x 10^2 is 200 in standard form and 200 is greater than 1.

7 0

3 years ago

Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 6.4. If 64 people ar

Murrr4er [49]

Answer:

99.38%

Step-by-step explanation:

We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64

They ask us for P (x <126)

For this, the first thing is to calculate z, which is given by the following equation:

z = (x - m) / (sd / (n ^ 1/2))

We have all these values, replacing we have:

z = (126 - 124) / (6.4 / (64 ^ 1/2))

z = 2.5

With the normal distribution table (attached), we have that at that value, the probability is:

P (z <2.5) = 0.9938

The probability is 99.38%

4 0

3 years ago