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Nesterboy [21]
3 years ago
5

Seven of ten students polled say that they prefer to practice for a team sport after school than before school. Based on this sa

mple, how many students would you expect out of a population of 120 to prefer to practice after school?
70

36

84

77
Mathematics
2 answers:
Firlakuza [10]3 years ago
4 0

Answer:

Number of students who to prefer to practice after school are:

  84

Step-by-step explanation:

Seven of ten students polled say that they prefer to practice for a team sport after school than before school.

this implies that 7/10 part of the population prefer to practice for a team sport after school than before school.

Population of school=120

Hence, number of students who to prefer to practice after school are

             7×120/10

         =  84

Hence, 84 students prefer to practice after school

Jet001 [13]3 years ago
3 0
7/10 is 70%
70% of 120 is 84.

So 84 people would prefer to practice after school.
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TIME REMAINING
erik [133]

Answer:

$1,131.20 is the amount earned

Step-by-step explanation:

<u>Key skills needed: Simple Interest Formula, Operations ( +, - , x , / )</u>

1) To understand this problem, you need to know the simple interest formula.

A = P(1+rt)

A is the amount

P is the principal

R is the interest rate as a decimal

T is the time in years

2) The 1st thing we need to do is convert the interest rate into a decimal. We have 14%. To convert into decimal form, we divide it by a 100, or move the decimal 2 places to the left. This is 0.14 --> So r=0.14

3) Next we use the formula:

A = 1,010(1+ 0.14(8))

  1. We first do 0.14(8) which is 1.12 and then add it to the 1 value, so you will get --> A = 1,010(2.12)
  2. Multiply and you will get A = $2,141.20
  3. To find the interest earned, you subtract this by the original amount, so $2,141.20 - $1,010 which would be $1,131.20

This means $1,131.20 is your answer.

<em>Hope you understood and have a nice day!! :D</em>

8 0
3 years ago
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