The heights of adult men in america are normally distributed, with a mean of 69.1 inches and standard deviation of 2.65 inches.
2 answers:
Answer:
Answer is 21%
Step-by-step explanation:
Let X be the heights of adult men in America
X is Normal with mean =69.1 and std dev = 2.65 inches
Percentage of adult males who are under 5 ft 7inches
= height less than 67 inches (since 1 ft = 12 inches)
P(X<67)
=P(Z<
=P(Z<-0.79)
=0.5-0.2852
=0.2148
=21.48%
Hence 21% nearly of males in America are shorter than 5'7"
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Answer:
The number of fringes at is given as 20.
Step-by-step explanation:
Question
A Galapagos cactus finch population increases by half every decade. The number of finches is modeled by the expression
,
where d is the number of decades after the population was measured. Evaluate the expression for d = −2
Given :
The number of finches is modeled by the expression :
⇒
where is the number of decades after the population was measured.
To evaluate the expression for d=-2
Solution:
In order to evaluate the given expression to find the number of finches at , we will plugin
for
in the expression and simplify it.
Plugging in in the expression:
⇒
Using negative exponent property. [
⇒
⇒
⇒ (Answer)
Thus, the number of fringes at is given as 20.
This means the number of fringes two decades ago was 20.