Answer:
0.13% of students have scored less than 45 points
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
About what percent of students have scored less than 45 points?
This is the pvalue of Z when X = 45. So
has a pvalue of 0.0013
0.13% of students have scored less than 45 points
1. Walks slowly to school: rising line that slowly rising up
2. Stay at school the whole day: straight line for a period of time
3. Walks faster rate walking back home without stopping: descending line that quickly falls
It’s picture 2
Okay. Let’s see... In total, the time would be 5 hours and 15 minutes. We can turn everything to minutes first. It’ll be 315 minutes. Divide that by miles, 4.05... so if we round it, 4.05 miles/per minute
Answer:
Y is going to triple(y1=3y)
Step-by-step explanation:
y=5/x;
x triples means y1=5/(3x);
Y1 divided by y, we get (5/x)/(5/3x)=(5/x)*(3x/5)=3
Answer:
Step-by-step explanation:
we know that
when
-------> complementary angles
so
Because
-------> complementary angles
In this problem the product of
is equal to
therefore
