Answer:
16% of students will complete the exam in less than 60 minutes
Step-by-step explanation:
The Empirical Rule(68-95-99.7) 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 = 70
Standard deviation = 10
What percentage of students will complete the exam in less than 60 minutes
60 = 70-10
So 60 is one standard deviation below the mean
By the Empirical Rule, 68% of the measures are within 1 standard deviation of the mean, that is, from 60 to 80 minutes. The other 100-68 = 32% is outside this interval. Since the normal distribution is symmetric, 16% of those are below 60 and 16% of those are above 80.
16% of students will complete the exam in less than 60 minutes
Distribuitive property...
Answer: 1.1
Step-by-step explanation:
If Sam buys 14 water bottles, he will have spent 18.9, so when you subtract 20 (the limit) from 18.9 (how much money he'll spend on the water bottles) you get 1.1
Answer:
0, 1, or 2 solutions
Step-by-step explanation:
The equation |ax + b| = c
The equation have absolute value symbol
Absolute value always gives us the positive number.
For absolute value function , we need to consider two cases
positive and negative.
|x|=x for positive , and |-x|=x for negative case
For negative case we include negative sign
So |ax + b| = c can be written as 2 equations
(ax+b)=c (ax+b)=-c
So we will get maximum of 2 solutions
The equation |ax + b| = c must have 0, 1, or 2 solutions
