Hopefully try is works. Took me a few hrs to figure it out but I think I got it
4. The square root of 5 less than twice a number is 7. Find the number.
1 answer:
Answer:
3.5
Step-by-step explanation:
we can divide that
- the square root of 5
- less than
- twice a number is 7
as you see the first one is really easy
the second one is < because it points to the lower number
the third one we have
twice a number is 7
let's say x is the number
so twice x is 7
twice means 2 times
so 2 times x is 7
so the number is 3.5
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Answer:
Probability that average height would be shorter than 63 inches = 0.30854 .
Step-by-step explanation:
We are given that the average height of 20-year-old American women is normally distributed with a mean of 64 inches and standard deviation of 4 inches.
Also, a random sample of 4 women from this population is taken and their average height is computed.
Let X bar = Average height
The z score probability distribution for average height is given by;
Z = ~ N(0,1)
where, = population mean = 64 inches
= standard deviation = 4 inches
n = sample of women = 4
So, Probability that average height would be shorter than 63 inches is given by = P(X bar < 63 inches)
P(X bar < 63) = P( <
) = P(Z < -0.5) = 1 - P(Z <= 0.5)
= 1 - 0.69146 = 0.30854
Hence, it is 30.85% likely that average height would be shorter than 63 inches.
Answer:
Step-by-step explanation:
We need to find union of given sets and
We know by definition that union of two given sets say A and B is set C with all the unique and common values given in set A and B.
∴ ∪
=