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Inga [223]
3 years ago
9

There are 19 children in Irene's preschool class. During free time yesterday, 7 of them chose to play dress-up. What is the expe

rimental probability that a randomly selected preschooler would choose to play dress-up today?
Mathematics
1 answer:
ICE Princess25 [194]3 years ago
6 0

Answer:37%

Step-by-step explanation:

There are 19 children, so the denominator is 19.

There were 7 playing dress-up, so the numerator is 7.

The fraction is \frac{7}{19}. 7/19=0.3684~0.37

To convert decimals into percentage, mulitply by 100 and use a percent sign.

0.37*100=37%

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A painter earns $119.00 for 7 hours of work. Which of the following is an equivalent rate?
spayn [35]
The answer is D I think!
7 0
3 years ago
The length of a social media interaction is normally distributed with a mean of 3 minutes and a standard deviation of .4 minutes
Kazeer [188]

The  probability that an interaction lasts longer than 4 minutes is 0.0062.

<h3>What is probability theory?</h3>

probability theory in mathematics  focus on the  analysis of random phenomena and this theory let us know that the outcome of a random event cannot be determined before it occurs.

z = (4 - 3)/.4

z = 1/.4

z = 2.5

0.0062

Hence The  probability that an interaction lasts longer than 4 minutes is 0.0062.

Read more on the probability here:

brainly.com/question/3248965

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3 0
2 years ago
Given that
valentina_108 [34]

Answer: x= -3.25

Step-by-step explanation:

R=4x+6y   11=4x+6(4)     11=4x+ 24     11-24=4x   -13=4x  -13/4=x  x=-3.25

11=4(-3.25)+ 6(4)  11= -13+24

6 0
3 years ago
CAN SOMEONE PLEASE HELP ME I'M STUCK. PLEASE<br> I don't understand and know how to solve it.
xenn [34]

Answer:

7/10

Step-by-step explanation:

red + green = 50 + 20 = 70 marbles

Total marbles = 50 + 30 + 20 = 100 marbles

P(red or green) = 70/100

P(red or green) = 7/10

8 0
3 years ago
What is the best approximation for the circumference of a circle with a radius of 125 m?
ANEK [815]

Answer:

Option B is correct

circumference of a circle is 785 m

Step-by-step explanation:

Circumference of the circle(C) is given by:

C = 2\pi r

where

r is the radius of the circle

As per the statement:

radius of the circle is 125 m

then substitute in [1] we have

C = 2 \cdot 3.14 \cdot 125

Simplify:

C = 785 m

Therefore, the circumference of a circle is 785 m

8 0
3 years ago
Read 2 more answers
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