7 divided by 2, plus the product of -4 and a number s
1 answer:
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Answer:
81.8%
Step-by-step explanation:
Mean =
Standard deviation =
Now we are supposed to find out what percent of the numbers fall between 35 and 50
Substitute the values
Now for P(35<x<50)
Substitute x = 35
Substitute x = 50
So, P(-1<z<2)
P(z<2)-P(z<-1)
=0.9772-0.1587
=0.8185
=
=81.8%
Hence 81.8% percent of the numbers fall between 35 and 50
We write an inequality:
This equation cannot be solved using trivial methods found in high-school classes, so we resort to graphical examination.
is a linear function while 
is an exponential one (with limit zero as 
approaches 
). We see that 
at approximately 
and 
.
Indeed, using a computer algebra system such as the ones on modern TI calculators and on many internet sites gives equality at
. By observing our graph, we see that when 
or 
.
This equation cannot be solved using trivial methods found in high-school classes, so we resort to graphical examination.
Indeed, using a computer algebra system such as the ones on modern TI calculators and on many internet sites gives equality at