3/4 * 2/3 = 6/12 or 1/2
1/2 * 4/5 = 4/10 or 2/5
I think this is right but I am not 100% sure
7/10 = 0.70. They are equal.
Step-by-step explanation:
the average is the sum of all data points divided by the number of data points (5).
2 hours 17 minutes
2 hours 48 minutes
1 hour 53 minutes
2 hours 19 minutes
1 hour 38 minutes
------------------------------
8 hours 175 minutes
175 minutes = 2 hours 55 minutes
so, we need to add this to the 8 hours and get
10 hours 55 minutes
this we need to divide by 5 for the average time
(10 hours 55 minutes) / 5 = 2 hours 11 minutes =
= 2×60 + 11 = 120 + 11 = 131 minutes.
so, their score is 131.
Answer:
33 people in school jazz band
Step-by-step explanation:
14 boys + 19 girls = 33 people in school jazz band
Answer:
95% of premiums that are between $600 and $1300.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 950
Standard deviation = 175
Estimate the percent of premiums that are between $600 and $1300.
600 = 950 - 2*175
So 600 is two standard deviations below the mean.
1300 = 950 + 2*175
So 1300 is two standard deviations above the mean
By the Empirical Rule, 95% of premiums that are between $600 and $1300.