Using the empirical rule 68% would fall within one standard deviation of the mean.
The standard deviation is given as 2 inches and the mean is 49 inches.
Since it is only one standard deviation find the lower number by subtracting the standard deviation from the mean and find the higher number by adding the standard deviation to the mean.
49 - 2 = 47
49 + 2 = 51
68% would be between 47 inches and 51 inches tall.
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be
or
so
if w^2-9w+81 is perfect square, factored form is either
or
aka
or
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not
In order to determine 1/11 as a decimal you need to divide 1 by 11. This would equal 0.0909090909090909. Rounding this number to three decimal places would equal 0.091.
QUESTION :-
what is the value of x to the nearest whole number?
ANSWER :-
SO
the nearest whole number-->
20.7 --> approximately --> 21 units
14 + 8(12-34)
14 + 8(-22)
14 - 176
- 162 is your answer
hope this helps