<h2>
Answer:</h2>
The number of trees which are less than 20 meters are:
9
<h2>
Step-by-step explanation:</h2>
Based on the histogram we are asked to find the number of trees which are less than 20 meters in height.
Class interval Frequency
4-8 1
8-12 2
12-16 2
16-20 4
20-24 6
24-28 4
28-32 2
i.e. we are asked to find the total number of tress that lie in the class interval 4-20.
i.e. we add the frequencies that lie in the interval 4-20
i.e. Number of trees= 1+2+2+4=9 trees.
Answer:
A
Step-by-step explanation:
First, 0 doesn't have any i values, so 0 is not pure imaginary.
Also, 0 <em>is</em> indeed a real number, so it is not a "non-real complex number."
Therefore, the only option left is that 0 is a complex number, and 0 is indeed a complex number.
The answer is A.
Answer:
-1
Step-by-step explanation:
(0, 0) and (3, 3)
To find slope:
3-0/3-0 = 3/3 = 1
Since it's looking for the perpendicular slope, you just do the opposite of 1.
Which is -1.
Answer:
Between 21 years and 75 years
Step-by-step explanation:
Given that a real estate company is interested in the ages of home buyers. They examined the ages of thousands of home buyers and found that the mean age was 48 years old, with a standard deviation of 9 years.
X the ages of home buyers is N(48, 9)
a) 
Hence using Cheby chev inequality
b) 
c) Using normal distribution we have
d) z value is 2.97
Hence x lies between
Between 21 years and 75 years
Answer:
A-14
Step-by-step explanation:
All the angles of the triangle ABC are 60°.
Therefore it is an equilateral triangle.
All sides of an equilateral triangle are equal.
Hence, AC = 14
