The following two-way frequency table shows information collected from a survey of students regarding their grade level and how they spend their screen time.
Grade vs. Uses the Watches Plays Video
Total
Screen Time Internet TV Games
7th Grader 6
3
6
15
8th Grader 8
3
2 13
Total 14
6
8
28
What is the probability that a student uses the Internet, given that he or she is in eighth
grade?
Enter your answer rounded to two decimal places, like this: 0.42

0.62

Step-by-step explanation:

In the picture attached, the table is shown.

We want to find the probability that a student uses the Internet, given that he or she is in eighth  grade. Mathematically:

P(Internet | eighth  grade) = P(Internet ∩ eighth  grade)/P(eighth  grade)

P(Internet | eighth  grade) = (8/28)/(13/28) = 8/13 = 0.62

a negative exponent is translated as follows:

so, we have

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl