2. The average human lifespan is 79 years with a standard deviation of 15 years.
a) Draw the normal density curve for this distribution.
K-12 SSO
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b)
What is the probability that someone will live between 49 and 64 years?
c)
What percent of humans will live longer than 109 years?
d)
Sixty-eight percent of humans have a lifespan between what ages?

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

125 yards

step-by-step explanation:

i take 75 plus 50.

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )