Answer:
50
Step-by-step explanation:
4(33-8)÷2
4(25)÷2
100÷2
50
Answer:
134.6
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula. This is X when Z has a p-value of 1-0.01 = 0.99. So it is X when Z = 2.325.
The level is L = 134.6
The Central Limit Theorem estabilishes that, for a random variable X, with mean and standard deviation, large sample size can be approximated to a normal distribution with a mean and standard deviation
b > 3
_
Pretend that the line is right below the greater than sign.
Answer:
6 13/20 hours
Step-by-step explanation:
Addition of fractions requires they be expressed using a common denominator. Here, that will be 5·4 = 20, and the two fractions can be written as ...
2/5 = 8/20
1/4 = 5/20
Then the sum of the mixed numbers is ...
(4 2/5) +(2 1/4) = (4 +2) +(2/5 +1/4) = 6 +(8/20 +5/20)
= 6 13/20
It took Kareem 6 13/20 hours to clean the two rooms.
