Answer:
where are the numbers
Step-by-step explanation:
Answer: 14
Step-by-step explanation:
13 + 6/6 = ?
13 + 1 = 14
Conver to y=mx+b form
m=slope
b=yintercept
y-12=3x
add 12 both sides
y=3x+12
m=3
b=12
gradient aka slope=3
yintercept=12
Use both!
You want to minimize <em>P</em>, so differentiate <em>P</em> with respect to <em>x</em> and set the derivative equal to 0 and solve for any critical points.
<em>P</em> = 8/<em>x</em> + 2<em>x</em>
d<em>P</em>/d<em>x</em> = -8/<em>x</em>² + 2 = 0
8/<em>x</em>² = 2
<em>x</em>² = 8/2 = 4
<em>x</em> = ± √4 = ± 2
You can then use the second derivative to determine the concavity of <em>P</em>, and its sign at a given critical point decides whether it is a minimum or a maximum.
We have
d²<em>P</em>/d<em>x</em>² = 16/<em>x</em>³
When <em>x</em> = -2, the second derivative is negative, which means there's a relative maximum here.
When <em>x</em> = 2, the second derivative is positive, which means there's a relative minimum here.
So, <em>P</em> has a relative maximum value of 8/(-2) + 2(-2) = -8 when <em>x</em> = -2.
Answer:
The total sales during the promotion is $69.6
Step-by-step explanation:
we are given
The average daily sales at a bookstore was(7.6k + 2.2) dollars over a 4-day promotion
we have to find total sales during 4 days
so, we can integrate it to find total sales
now, we can solve it
now, we can plug bounds
and we get
So,
the total sales during the promotion is $69.6
