Can somebody please check my answers?Three dentists wanted to compare the ages of their patients. They each calculated their patients’ mean age and the mean absolute deviation of their ages. They displayed the results in a table.

Which statements are true? Choose exactly TWO answers that are correct.

Image:
Dentist Mean patient age MAD
Appiah 43 9.7
Cantwell 29 13.9
Singh 41 14.1




A. Dr. Appiah’s patients’ ages vary more than do Dr. Cantwell’s patients’ ages.

B. Dr. Appiah’s patients’ ages vary less than do Dr. Singh’s patients’ ages.

C. Dr. Cantwell’s patients’ ages and Dr. Singh’s patients’ ages vary about the same amount.

D. Dr. Singh’s patients’ ages and Dr. Appiah’s patients’ ages vary about the same amount.

I think it's A and B.

10 points for the correct answer!

Taking first summation ∑(1+3n) first

First see few terms of this series. To get first term plug n =0 in 1+3n

So for n =0,

similarly for next term plug n =1

For n = 1,

For n =2,

So on ,........and last term will be for n =4

For n =4,

So we get terms as 1,4,7,.. with constant difference of 3 between succesive terms. So its arithemetic series. Sum formula for arithmetic series is

where n is total number of terms, and are first and last term in series

So here n = 5 ( as n is from 0 till 4). so plug value of n as 5, as 1 and as 13 in sum formula

So sum of first series is 35

Similarly find sum of second series. Plug i values in 3i-5 as shown and find few terms in series

for i =2,

for i =3,

so on .... and for last term plug i as 6

for i =6,

So for sum we will plug n as 5 ( i =2,3,4,5,6 so total 5 terms), then plug as -2 and as 13 in sum formula

So sum of second series is also 35

So difference between sums of both series will be 35-35 =0

Final answer here is 0

The required equivalent term equal to 14 tens is equal to 140.

Given that,
To determine the equivalent term to 14 ten.

What is arithmetic?

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,

What is simplification?

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
14 tens, implies 10 times the value of 14.
= 14 * 10
= 140

Thus, the required equivalent term equal to 14 tens is equal to 140.

Learn more about arithmetic here:

brainly.com/question/14753192

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Answer:

9 inches

Step-by-step explanation:

24/2.5 is 9.6 BUT 0.6 IS NOT A FULL PIECE, SO IT IS 9 INCHES