Answer:
Hey there!
Think of 45000 being split to 9 pieces.
Each piece would be 5000 dollars.
Thus, the ratio would be 20000 to 25000
Hope this helps :)
Answer:

And using the normal standard distribution table or excel we got:

The excel code would be:
"=NORM.DIST(1.38,0,1,TRUE) -=NORM.DIST(0,0,1,TRUE)"
Step-by-step explanation:
For this case we know that our random variable of interest is Z and the distribution is given by:

This distribution is an special case of the normal distribution.
And we want to find this probability:

And we can find this probability with this difference and using the concept of cumulative distribution function for a continuous distribution:

And using the normal standard distribution table or excel we got:

The excel code would be:
"=NORM.DIST(1.38,0,1,TRUE) -=NORM.DIST(0,0,1,TRUE)"
Answer:
e = 1/2
Step-by-step explanation:

multiply both sides by 2

Unit rate is 3. equation is 21÷7=3