Which object would weigh closest to 5 pounds A.Bee B. Flour C.Hat D.Football
1 answer:
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Answer:
(a) The function is increasing and decreasing
(b) The local minimum is x = 5 and the maximum is x = -6
(c) The inflection point is
(d) The function is concave upward on and concave downward on
Step-by-step explanation:
(a) To find the intervals where is increasing or decreasing you must:
1. Differentiate the function
2. Now we want to find the intervals where f'(x) is positive or negative. This is done using critical points, which are the points where f'(x) is either 0 or undefined.
These points divide the number line into three intervals:
,
, and
Evaluate f'(x) at each interval to see if it's positive or negative on that interval.
Therefore f(x) is increasing and decreasing
(b) Now that we know the intervals where f(x) increases or decreases, we can find its extremum points. An extremum point would be a point where f(x) is defined and f'(x) changes signs.
We know that:
- f(x) increases before x = -6, decreases after it, and is defined at x = -6. So f(x) has a relative maximum point at x = -6.
- f(x) decreases before x = 5, increases after it, and is defined at x = 5. So f(x) has a relative minimum point at x = 5.
(c)-(d) An Inflection Point is where a curve changes from Concave upward to Concave downward (or vice versa).
Concave upward is when the slope increases and concave downward is when the slope decreases.
To find the inflection points of f(x), we need to use the f''(x)
We set f''(x) = 0
Analyzing concavity, we get
The function is concave upward on because the f''(x) > 0 and concave downward on
because the f''(x) < 0.
f(x) is concave down before , concave up after it. So f(x) has an inflection point at
.
Answer:
a. There is more variability in the prices of kid socks because they have a greater range.
Step-by-step explanation:
A measure of variability is a summary statistic that represents the amount of dispersion in a dataset. Common examples are range, interquartile range (IQR), variance, and standard deviation.
From the histogram
Highest Number of Packs of Adult Socks = 7
Lowest Number of Packs of Adult Socks = 5
Range = 7 - 5 =2
Highest Number of Packs of Kid Socks = 7
Lowest Number of Packs of Kid Socks = 4
Range = 7-4 = 3
We conclude that there is more variability in the prices of kid socks because they have a greater range.
The correct option is A.
