Answer:
The mean will stay the same.
The standard deviation will decrease.
Step-by-step explanation:
For the 5 cards, she has received, the mean will be:
μ=(∑x)/n
=125/5
=25
The mean is 25 and the standard deviation is 10.
σ=10
If a new card is received with $25, then the sum will be $150
So the new mean will be:
μ'=(∑x)/n
=150/6
=25
And the new standard deviation will be:
σ'= 9.12
We can clearly see that
μ= μ'
and
σ> σ'
So the mean will remain the same and standard deviation will decrease.
.
Answer:
A) 10
Step-by-step explanation:
Apex :)
Answer:
33cm
Step-by-step explanation:
area of a rectangle= length ×width
Let x be the length
990=x( x-3)
990=x^2-3x
x^2-3x-990=0
x^2+30x-33x-990=0
x(x+30)-33(x+30)=0
(x-33)(x+30)=0
x=33, x=-30
length is positive so it'll be 33cm
Answer:
23 + 31
Step-by-step explanation:
The range of the parabola that opens down and has its vertex as (2, 5) is (b) ![(-\infty,5]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C5%5D)
<h3>Vertex</h3>
The vertex of a parabola can represent the minimum or the maximum point in the parabola
The vertex of the parabola is given as:
<h3>The range</h3>
The range of a function is the set of output values the function can take
From the question, we understand that the parabola opens down.
This means that, the vertex of the parabola is a maximum.
Hence, the range of the parabola is
Read more about parabola at:
brainly.com/question/13136492
