Answer:
(2n + 7) (2n +7)
Step-by-step explanation:
To solve this problem we need to factorize 4n^2 + 28n +49 as shown below
thus, after factorization we see that first option is correct one
(2n + 7) (2n +7)
we can validate this by expanding it
2n (2n +7) + 7 (2n+7)\
=> 4n^2 + 14n + 14n + 49 = 4n^2 + 28n +49 (which is equal to the problem stated expression)
Answer:
The claim is false that the mean temperature of humans is less than 98.6°F
Step-by-step explanation:
Claim :The mean temperature of humans is less than 98.6°F
They obtained 200 measurements
Sample size n =200
x = 98.3°F
Since n > 30
So we will use z test
Formula :
Substitute the values in the formula :
Refer the z table for p value
p value = 0.3520
α= 0.01
p value > α
So, we accept the null hypothesis.
So, the claim is false that the mean temperature of humans is less than 98.6°F .