Answer:
128 my answer needs to be long so im just gonna span a little
Answer:
Length of AC = <u>12units</u>.
Step-by-step explanation:

- Hypotenuse of the triangle =

- Height of the triangle =


Base of the triangle.

As we know that,
Pythagoras Theorem:

So, In triangle ABD by putting the value of hypotenuse and height in this formula we get,












Since, it is given that BD is the perpendicular bisector of AC so length of AC will be doubled.
Therefore, length of AC of the given triangle = 
32.6 is slready rounded to the nearest 10ths
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
Well idk what the numbers are, but the formula to find the are is 3.14(pi) x r^2