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3 years ago

9

?? Please help answer and solve, showing the steps you took

1 answer:

Aleksandr-060686 [28]3 years ago

4 0

We apply the concept of calculus here. You can determine the minimum or maximum in here if you take the derivative of a function and equate it to zero. The solution is as follows:

n = 20t² - 20t +120
dn/dt = 0 = 40t - 20 + 0
40t - 20 = 0
40t = 20
t = 20/40
t = 1/2 or 0.5

Therefore, the number of bacteria would be minimal at 0.5°C.

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If you can help me please help me because I really want to understand this topic thank you

ludmilkaskok [199]

Answer:

D

Step-by-step explanation:

add 3 to both sides to get x on its own: x>5

you find 5 on the number line, and then because x is greater it could be: 6, 7, 8, 9, 10, etc.

because of this the line points left.

5 0

3 years ago

The best way to solve the equation log 6 (6)^7 = x is

dybincka [34]

Answer:

(A) put the 7 in front of the log

log 6 (6)^7 = x

7 * log 6 (6) = x

7 * 1 = x

x = 7

6 0

3 years ago

Find the inverse of the given function

xenn [34]

For this case, we must find the inverse of the following function:

$f (x) = \frac {5x + 1} {- x + 7}\\x\neq 7$

To find the inverse we follow the steps below:

$y = \frac {5x + 1} {- x + 7}$

We rewrite the denominator:

$y = \frac {5x + 1} {- (x-7)}\\y = - \frac {5x + 1} {(x-7)}$

We exchange variables:

$x = - \frac{5y + 1} {(y-7)}$

We solve for y:

We multiply on both sides of the equation by (y-7)

$x (y-7) = - 5y-1\\xy-7x = -5y-1$

We subtract xy on both sides of the equation:

$-7x = -5y-1-xy$

We add 1 to both sides:

$-7x + 1 = -5y-xy$

We factor for y:

$-7x + 1 = y (-5-x)$

We divide both sides by (-5-x):

$y = \frac {-7x + 1} {- 5-x}$

So, we have:

$f ^ {- 1} (x) = \frac {-7x + 1} {- 5-x}$

Answer:

$f ^ {- 1} (x) = \frac {-7x + 1} {- 5-x}$

$x\neq -5$

3 0

4 years ago

At the newest animated movie, for every 9 children, there are 4 adults. There are a total of 39 children and adults at the movie

Anuta_ua [19.1K]

Answer:

There is no question but if your wondering how many adults there are there would be 20 adults in all and 3 kids are left over.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

16/21 divided by 4/9

leonid [27]

16/21 divided by 4/9 is equivalent to 16/21 x 9/4 = 144/84 which reduces to 12/7. So 12/7 is your answer.

7 0

3 years ago

Read 2 more answers