256×7=1792 in expanded form it is 1000+700+90+2
Answer:
86
Step-by-step explanation:
Mean scores of first test =
Standard deviation of first test scores =
Mean scores of second test =
Standard deviation of second test scores =
We have to find if a student scores 29 on his first test, what will be his equivalent score on the second test. The equivalent scores must have the same z-scores. So we have to find the z-score from 1st test and calculate how much scores in second test would result in that z-score.
The formula for z-score is:
Calculating the z-score for the 29 scores in first test, we get:
This means, the equivalent scores in second test must have the same z-scores.
i.e for second test:
Rounding of to nearest integer, the equivalent scores in the second test would be 86.
Answer:
4
Step-by-step explanation:
a scale factor means how much something changes in length, area, or volume. it is somewhat like a multiplier. EF is 12 units long but E'F' is 3 so 12 ÷ 3 = a scale factor of 4
Answer:
And we can find this probability to find the answer:
And using the normal standar table or excel we got:
Step-by-step explanation:
Let X the random variable that represent the amounts of nocatine of a population, and for this case we know the distribution for X is given by:
Where and
We have the following info from a sample of n =37:
the sample mean
And we want to find the following probability:
And we can use the z score formula given by;
And if we find the z score for the value of 0.872 we got:
And we can find this probability to find the answer:
And using the normal standar table or excel we got:
I think it’s 182.27$.
Sorry if i’m wrong