Are you asking us what we think of the universe? lol
Air pollution<span> is a major environmental </span>risk<span> to </span>health<span>. By reducing </span>air pollution<span> levels, countries can reduce the burden of disease from stroke, heart disease, lung cancer, and both chronic and acute respiratory diseases, including asthma.</span>
Answer:
<em>The data set marked as B has the largest standard deviation</em>
Explanation:
<u>Standard Deviation</u>
It's a number used to show how a set of measurements is spread out from the average value. A low standard deviation means that most of the values are close to the average. A high standard deviation means that the numbers are more spread out.
The formula for the standard deviation is

Where
is the value of each measurement, n is the number of elements in the set, and
is the average or media of the values, defined as

Let's analyze each set of data:
A.3,4,3,4,3,4,3
The average is

Computing the stardard deviation:


B.1,6,3,15,4,12,8
The average is

Computing the stardard deviation:


C. 20, 21,23,19,19,20,20
The average is

Computing the stardard deviation:


D.12,14,13,14,12,13,12
The average is

Computing the stardard deviation:


We can see the data set marked as B has the largest standard deviation
Answer:
3.13cm/s²
Explanation:
Given
Initial velocity u = 3.5cm/s
Final velocity v = 8.2cm/s
Time t = 1.5secs
Required
Acceleration of the cart a
To get that, we will use the equation of motion
v = u+at
Substitute the given parameters
8.2 = 3.5+1.5a
1.5a = 8.2-3.5
1.5a = 4.7
a = 4.7/1.5
a = 3.13cm/s²
Hence the acceleration to the cart is 3.13cm/s²