Which of the following expressions represents a value greater than 4/5 ?

Mathematics

2 answers:

ycow [4]3 years ago

4 0

Answer:

5/5

Step-by-step explanation:

Aliun [14]3 years ago

3 0

Answer:

For the two fractions 4/5 and 5/6, the least common denominator is 30. The fraction 4/5 is equivalent to 24/30 (To get this I multiplied both the numerator and denominator by 6). ... Since 25 is greater than 24, 25/30 (or originally 5/6) is the larger fraction

Step-by-step explantion

Compare fractions with the same denominator by determining the relationship between the numerators. For example, 3/5 is less than 4/5 because 3 is less than 4

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Suppose medical records indicate that the length of newborn babies(in inches) is normally distributed with a mean of 20 and a st

Nadusha1986 [10]

Answer:

P=0.954 or 95.4%

Step-by-step explanation:

Using the formula for the standardized normal distribution to find Z:

$Z=\frac{X-\mu}{\sigma}$

Where μ is the mean (μ=20) and σ is the standard deviation (σ=2.6).

$Z_{1} =\frac{14.8-20}{2.6}=-2.0$

$Z_{1} =\frac{25.2-20}{2.6}=2.0$

In the table of the normal distribution, we can look for positive values z, and these values are going to represent the area under the curve between z=0 and the values searched. the negatives values are found by symmetry (with the corresponding positive value but remember this area is under the left side of the curve). To find a value in the table, find the units in the first column and the follow over the same row till you find the decimals required.

$P_1=0.4772$

$P_2=0.4772$

$P_1$ represents the probability of length being between 14.8 and 20 (the mean) and $P_2$ represents the probability of length being between 20 and 25.2, The requested probability is the sum of these two.