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wariber [46]
3 years ago
8

The number of bacteria in a culture is increasing according to the law of exponential growth. After 3 hours there are 100 bacter

ia, and after 6 hours there are 800 bacteria. How many bacteria will there be after 7 hours?
Mathematics
1 answer:
Vika [28.1K]3 years ago
3 0

I think the answer is 1600.

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Look at pic thanks<br> then tell anser
sp2606 [1]

Answer:

thanks for the points

Step-by-step explanation:

it's a lot not "alot" by the way thought you would like to know.

8 0
3 years ago
BRAINLIESTTTTT!!!!
Debora [2.8K]
Hi!

Samuel bought the mixer for $54,205. The value of this (the prive) decreases every year at a costant rate (so, for example, it may decrease of $100 every year).

we are solving for t and we should keep in mind that we multiply the price for the function (1 - rate/100)^time

in f(t) you put the value of year 1 for example

f(t) = 54205(1- \frac{value1-value2}{value1}) ^t

Solving for r will bring us to the solution, and we can substitute 1 to t since we are calculating how much it decreases after ONE year.

We would divide for 54205 to cancel out that 54205 multiplicating the parenthesis.

Also, the x is given by the formula (vale2-value1)/value1 to see how much the price changes from year 1 to year 2

We will get f(t) = 54205(\frac{(47000-41000)}{47000}) ^1

Again, it would be:

f(t) = 54205(0.13)^1
7 0
4 years ago
Read 2 more answers
An ongoing promotion at a department store gives customers 20% off the portion of their bill that is over $100. Ruby's total bil
BigorU [14]

Answer:

The correct option is:

100 + 0.8(x - 100) = 250

Step-by-step explanation:

We are given that:

We know that a department store gives 20 % off the portion of the bill that is over 100 dollars.

Total bill is 250 and x is the amount of money she would have spent without the promotion.

The cost to which the discount applies is 0.8 ( x - 100 ).

<em>Finally the equation we get is 100 + 0.8 (x - 100) = 250.</em>

3 0
4 years ago
Find the equation of the line, in slope-
Yuri [45]

Answer:

y= 3x +11

Step-by-step explanation:

<u>slope-intercept form:</u>

y= mx+c, where m is the gradient and c is the y-intercept.

Given that the slope is 3, m=3

substitute m=3 into the equation:

y= 3x +c

To find the value of c, substitute a coordinate.

When x= -3, y=2,

2= 3(-3) +c

c -9= 2

c= 9 +2 <em>(</em><em>+</em><em>9</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>

c= 11 <em>(</em><em>s</em><em>implify</em><em>)</em>

Thus, the equation of the line is y= 3x +11.

3 0
3 years ago
What is the solution (ordered pair) for the following system of equations? 4x + 3y = 9 and 2x - y = 7?
Naddika [18.5K]

Solve for the first vaiable in one of the equation, then substitute the result into the other equation.

Point Form:

(3, -1)

Equation Form:

x = 3

y = -1

8 0
3 years ago
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