HELP PLZ! BRAINLIEST FOR WHOEVER ANSWERS! 100 sample widgets were taken from an assembly line for quality control purposes. The average thickness of the 100 samples was 8 mm, and the standard deviation of exactly 1 mm. a. Write a statement about the thickness of the widget at the 68% confidence level using a compound inequality.
b. Write a statement about the thickness of the widget at a 95% confidence level in plus/minus notation.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

what was there favorite food

where is the picture

step-by-step explanation: