You have a normal distribution of hours per week that music students practice. the mean of the values is 8 and the standard deviation of the values is 4. according to the normal distribution, half of the music students practice between 5.3 to 10.7 hours each week. what percentage of the students study less than 5.3 hours each week? 12.5% 20% 25% 50%

25%

Step-by-step explanation:

Since Normal Distribution is symmetrical Distribution and 5.3 and 10.7 are both 2.7 below and 2.7 above the mean respectively.

So, % of students less than 5.3 hours per week is 25%

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation: