The average building height and the standard deviation for two separate cities' samples are shown. The true statements are:
City A’s heights are more spread out than city B’s heights.
City A has a lower average height than city B.
<h3>
What is average?</h3>
In daily life, an average is a number chosen to represent a group of numbers; it is often the sum of the numbers divided by the total number of numbers in the group (the arithmetic mean). The average of the integers 2, 3, 4, 7, and 9, for instance, is 5, which equals 25. An average could alternatively be another statistic like the median or mode, depending on the situation. The median is sometimes used in place of the mean since the mean would be unnaturally high if it included the personal incomes of a few billionaires. The median is the amount below which 50% of personal incomes fall and above which 50% of personal incomes rise.
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Answer:
$30
Step-by-step explanation:
Answer:
<em>The voltage at the middle source is</em> 
Step-by-step explanation:
<u>Voltage Sources in Series</u>
When two or more voltage sources are connected in series, the total voltage is the sum of the individual voltages of each source.
The figure shown has three voltage sources of values:



The sum of these voltages is:

Operating:

We know the total voltage is
, thus:

Equating the real parts and the imaginary parts independently:
4+a=6
1+b=-3
Solving each equation:
a = 2
b = -4
The voltage at the middle source is 
Option A:

Step-by-step explanation:
Given polynomials are (5x + 8 – 6x) and (4 + 2x –7).
Let us first simplify the expression:
Combine like terms.
(5x + 8 – 6x) = (5x – 6x + 8) = –x + 8
(4 + 2x –7) = (4 – 7 + 2x) = –3 + 2x
Product of (5x + 8 – 6x) and (4 + 2x –7)
= (5x + 8 – 6x)(4 + 2x –7)
= (–x + 8)(–3 + 2x)
Multiply each term of one expression with each term of the other expression.
= (–x)(–3) + (–x)(2x) + 8(–3) + 8(2x)

Combine like terms and add.


Arranging the equation, starting with highest power.

Hence, the product of the two given polynomials is 