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%
6 hours 40 minutes
Mark brainliest please
Hope this helps you
Answer:
21503 feet²
Step-by-step explanation:
Area of Square 1 = 69 x 69 = 4761
Area of Triangle = 69 x 92 ÷ 2 = 3174
Area of Square 2 = 92 x 92 = 8464
Area of Circle = 57.5² x π ÷ 2 ≈ 5104
Total Area = 21503
Answer:
denominator
Step-by-step explanation:
The denominator tells how many equal parts the whole is subdivided into. The numerator tells the number of those parts that are under consideration.
Step-by-step explanation:
Given the average of 8 numbers = 56.
Then the Total sum of 8 numbers = 56 * 8
= 448.
Sum of 1st three numbers = 49 + 57 + 72
= 178.
So, the total = 448 - 178
= 270.
Average of the other 5 numbers = 270/5
= 54.
Verification:
178 + 270 = 448/8
= 56.
