What is the distance between the points (−4, 5) and (3, 5)?
2 answers:
Answer:
7
Step-by-step explanation:
let the first point be A(-4, 5) and the second point B(3, 5)
the formula for distance between two points on same axes is given as
AB = √(( -
)² + (
)²)
given in the question, = 3,
= 5,
= -4,
= 5
AB = √{[3 - (-4)]² + [5 - 5]²} = √49 = 7
coordinates are generally represented as
(x, y)
You might be interested in
Answer:
66.48% of full-term babies are between 19 and 21 inches long at birth
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the z-score of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Mean length of 20.5 inches and a standard deviation of 0.90 inches.
This means that
What percentage of full-term babies are between 19 and 21 inches long at birth?
The proportion is the p-value of Z when X = 21 subtracted by the p-value of Z when X = 19. Then
X = 21
has a p-value of 0.7123
X = 19
has a p-value of 0.0475
0.7123 - 0.0475 = 0.6648
0.6648*100% = 66.48%
66.48% of full-term babies are between 19 and 21 inches long at birth