2 years ago

Find the mean of the following group of numbers: 6.3, 5.9, 3.2, 5.9, 10.7. Round your answer to one decimal place.

1 answer:

7 0

The mean of the 1st question-
You add all the numbers up then divide them by how many numbers there are.
So you add 6.3+5.9+3.2+5.9+10.7=32
You then divide 32 by 5(there are five numbers)=6.4

2nd question-
Mean- add all numbers up divide by how many numbers there were
72+71+70+70+70+69+69+69+69+69+68+68+68+67+67=1036
then you take 1036 ÷15(amount of numbers)=69.06 round to 69.1

Find the median by putting the numbers in numerical order and finding the middle number, which is 69

You find the mode(most) by locating the number that is used multiple time which is 69

Therefore your answers are: 69.1, 69, and 69.

Hope that helped!! :)

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Identify the volume of a cone with base area 64π m2 and a height 4 m less than 3 times the radius, rounded to the nearest tenth.

melomori [17]

V=basearea times 1/3 times height
basearea=6<span>4π m2
hmm, they try to make it difficult

basearea=circle=pir^2
pir^2=64pi
divide by pi
r^2=64
sqrt
r=9

h is 4 les than 3 time r
h=-4+3(8)
h=-4+24
h=20

v=1/3*64pi*20=1280pi/3 m^3=1350.4

C
</span>

4 0

2 years ago

Adam is using the equation (x)(x + 2) = 255 to find two consecutive odd integers with a product of 255. When Adam solves the pro

kondaur [170]

$\bf (x)(x+2)=255\implies x^2+2x=255\implies x^2+2x-255=y
\\\\
\textit{setting y=0}\implies x^2+2x-255=0
\\\\
\textit{now, factoring that}
\\\\
(x+17)(x-15)=0\implies 
\begin{cases}
x=-17\\
x=15
\end{cases}$

notice the picture of the graph added here
low and behold, x = -17, y is 0, and x= 15, y is 0
the graph is touching the x-axis, an x-intercept
or so-called, a "solution"