What units are used when describing the length of time that the universe has been expanding? multiple choice a billions of years b millions of years c light years d light year kilometers e decades

I believe the answer is A) Billions of years since the universe is 13.8 Billion years old

A

Step-by-step explanation:

Assuming this is a "multiple choice question" where 1 answer is right

We are looking for a unit of "time", so option C and D are eliminated since both are units of "distance".

Looking at the other choices,

Decades mean 10 years and to describe the age of universe with this "small" number is inconvenient. So this is not right.

Millions of years is a big number, but comparing to the expanding time of the universe, it is rather small. We now know that after the Big Bang, around 5 or 6 billion years it has gone since the universe is expanding. So millions of years is small.

Billions of years will be the correct unit since it has been known that the universe has been expanding for the past 5 to 6 billion years.

Answer choice A is right.

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.  

the answer is 2/54

step-by-step explanation: