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Shalnov [3]
3 years ago
14

The following nine values represent race finish times in hours for a randomly selected group ofparticipants in an extreme 10k ra

ce (a 10k race with obstacles). Which of the following is closest tothe mean of the following data set?1.0, 1.2, 1.2, 1.3, 1.4, 1.5, 1.5, 1.7, 2.1
Mathematics
1 answer:
Leni [432]3 years ago
6 0

Answer:

The mean for the given sample of finish race time is 1.43 hours.

Step-by-step explanation:

We are given the following in the data set:

1.0, 1.2, 1.2, 1.3, 1.4, 1.5, 1.5, 1.7, 2.1

Formula:

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{12.9}{9} = 1.43

The mean for the given sample of finish race time is 1.43 hours.

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Which of the following gives a product of x^3 - 3x ?
Vilka [71]

Answer:

Option a

Step-by-step explanation:

Lets verify

RHS

\\ \rm\longmapsto x(x^2-3)

  • Use distributive law
  • a(b-c)=ab-bc

\\ \rm\longmapsto x(x^2)-3x

\\ \rm\longmapsto x^3-3x

\\ \rm\longmapsto LHS

Hence verifed

7 0
3 years ago
Read 2 more answers
A cube and the net for the cube are shown. <br><br> What is the surface area of this cube?
lozanna [386]
Ok, 6×25=150, since there are 6 sides, the answer is 150cm.
3 0
3 years ago
The area of a triangle with base 10in and height 4 in is<br> 20in^2<br> 40in^2<br> 15in^2<br> 60in^2
natta225 [31]

1/2(BH)

=1/2(10*4)

=1/2(40)

=20


5 0
3 years ago
In 2010, the population of Kingsford was 8000. By 2014 the population had increased by 15% and 2/5 of the population was age 12
Anastasy [175]
<h2>Hello!</h2>

The answer is: The population age 12 or under was 3680.

<h2>Why?</h2>

If in 2010 the population of Kignsford was 8000, and by 2014 the population had increased by 15% we need to calculate the total population and then, calculate how many people was age 12 or under.

We must remember that we cannot work with percentage values, so, to make 15% a real number, we need to divide it by 100:

15(Percentage)=\frac{15}{100}=0.15

So,

Calculating the population by 2014, we have:

Population_{2014}=Population_{2010}+ Population_{2010}*0.15

Then, substituting we have:

Population_{2014}=8000+ 8000*0.15=9200

Now, calculating the population that was age 12 or under, knowing that it was 2/5 of the total population, we have:

Population=TotalPopulation*\frac{2}{5}\\\\Population=9200*\frac{2}{5}=3680

So, the population age 12 or under was 3680.

Have a nice day!

6 0
3 years ago
F(x)=2x-3 g(x)=x^2+1 find g(2)
Hitman42 [59]

Answer:

g(2)=5

Step-by-step explanation:

since g(x) is equal to x^2+1, you just plug in the value of 2 for x, to get 2^2+1, and 2 to the power of 2 (also known as 2 squared) is equal to 4, which makes your equation 4+1, which equals 5.

3 0
3 years ago
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