Answer:
You are not allowed to use brainly for tests.. it is agianst their rules..
Step-by-step explanation:
Answer:
-4
Step-by-step explanation:
4+ (-2)^3
-2 *-2*-2 = -8
4 + -8
-4
Answer:
24:12:28:12
Step-by-step explanation:
76÷19=4
6×4:3×4:7×4:3×4
=24:12:28:12
Step-by-step explanation:
3x+x=-7-5
4x=-12
x=-12/4
x=-3
Answer:
At least 68% of observations lie between 22 and 26 months.
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 = 24
Standard deviation = 2
22 = 24 - 2
22 is one standard deviation below the mean
26 = 24 + 2
26 is one standard deviation above the mean.
So, by the empirical rule, at least 68% of observations lie between 22 and 26 months.
