Triangle A)
right
triangle B)
acute
triangle C)
obtuse
triangle D)
right
Answer:
The proportion of these light bulbs that will last less than the advertised time is 18.94% or 0.1894
Step-by-step explanation:
The first thing to do here is to calculate the z-score
Mathematically;
z-score = (x - mean)/SD
= (1500-1550)/57 = -50/57 = -0.88
So the proportion we will need to find is;
P( z < -0.88)
We shall use the standard score table for this and our answer from the table is 0.1894 which is same as 18.94%
Take the relative frequencies of each branch and multiply them together.
0.35 * 0.55 = 0.1925 or B
Answer:
This sentence is true.
Step-by-step explanation:
