All categories

3 years ago

What is the best estimate of the mean age of all the people in the tour group?

Mathematics

2 answers:

makvit [3.9K]3 years ago

8 0

This would be 30 because you have to add all the numbers you get from the problem so it would look like this ---> (19 +27 +25+21+44+22+45+34)8 = 29.625=30 (multiply the 8 with everything else just incase if you dont know how i got 29.625=30)
Hope this helps a lot :)
and a brainliest would help a lot

marissa [1.9K]3 years ago

7 0

Mean = (19 +27 +25+21+44+22+45+34)/8 = 29.625≈30 years

Answer is 30.

You might be interested in

I am a 3 digit number. The sum of my digits is 14. My ones place is 3 times as much as my hundreds place.

Murrr4er [49]

Answer:

329

Step-by-step explanation:

4 0

2 years ago

Keri is simplifying 5·10^−3.

11111nata11111 [884]

Answer:

1. D

2. A

Step-by-step explanation:

Q1. Kerry is simplifying $5\cdot 10^{-3}$

By the definition of negative powers,

$a^{-n}=\dfrac{1}{a^n}$

Hence,

$10^{-3}=\dfrac{1}{10^3}$

So, the first step in simplifying the expression is

$5\cdot 10^{-3}=5\cdot \dfrac{1}{10^3}$

Q2. Given the expression

$\dfrac{8}{10^{-2}}$

First, use the definition of negative powers:

$10^{-2}=\dfrac{1}{10^2}$

Thus,

$\dfrac{8}{10^-2}=\dfrac{8}{\frac{1}{10^2}}=8\cdot 10^2=8\cdot 100=800$

8 0

3 years ago

14w – 2(1 – w) = 2(5w - 1)

joja [24]

Answer:

w = 10

Step-by-step explanation:

Solving steps are shown in above pic. (source: Photomath)

8 0

3 years ago

Rita is making chili. The recipe calls for 4 3/4

love history [14]

Answer:

5 3/4

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The paint mixer wants to mix paint that is 30% gloss with paint that is 15% gloss to make 3.75 gallons of paint that is 20% glos

Kipish [7]

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

In this question we must determine the correct volumes of each paint to obtain a 20 % gloss with paint by means of weighted averages:

$c_{r} = x\cdot c_{a} +(1-x)\cdot c_{b}$ (1)

Where:

$x$ - Proportion of the paint that is 30 % gloss.
$c_{a}$ - Concentration ratio of the paint that is 30 % gloss.
$c_{b}$ - Concentration ratio of the paint that is 15 % gloss.
$c_{r}$ - Resulting concentration ratio

If we know that $c_{a} = 0.3$ , $c_{b} = 0.15$ and $c_{r} = 0.2$ , then the proportion of the paint that is 30 % gloss is:

$0.2 = 0.3\cdot x +(1-x)\cdot 0.15$

$0.2 = 0.15\cdot x+0.15$

$0.15\cdot x = 0.05$

$x = 0.33$

And the quantity of gallons needed of each paint are:

Paint (30 % gloss)

$V_{a} = 0.33\cdot (3.75\,gal)$

$V_{a} = 1.238\,gal$

Paint (15 % gloss)

$V_{b} = V-V_{a}$

$V_{b} = 3.75\,gal-1.238\,gal$

$V_{b} = 2..512\,gal$

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

To learn more on weighted averages, we kindly invite to check this question: brainly.com/question/18554478

8 0

2 years ago