The class average on a math test was an 82 with a standard deviation of 5. if the data is normally distributed, which statements are true?:

- about 68% of the students scored below an 87.
- a student scoring a 74 would have a z-score of -1.6
-a z-score of 2.6 would be A 95
- about 25% of the class scored above a 92
-about 16% of the class scored a 77 or below

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

ii6tyhj7 juj3yyj333ju jmyhthhtk7h jg hajj jiijh

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1