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MAXImum [283]
2 years ago
10

I need help 9th grade math

Mathematics
1 answer:
alexira [117]2 years ago
3 0

hope helps with the first the rest i cant read its not clear.

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he​ half-life for a link on a social network website is 2.6 hours. Write an exponential function T that gives the percentage of
pychu [463]

Answer:

% Remaining= [1-(1/2)^{\frac{t}{2.6}}]x100

And replacing the value t =5.5 hours we got:

% Remaining= [1-(1/2)^{\frac{5.5}{2.6}}]x100 =76.922\%

Step-by-step explanation:

Previous concepts

The half-life is defined "as the amount of time it takes a given quantity to decrease to half of its initial value. The term is most commonly used in relation to atoms undergoing radioactive decay, but can be used to describe other types of decay, whether exponential or not".

Solution to the problem

The half life model is given by the following expression:

A(t) = A_o (1/2)^{\frac{t}{h}}

Where A(t) represent the amount after t hours.

A_o represent the initial amount

t the number of hours

h=2.6 hours the half life

And we want to estimate the % after 5.5 hours. On this case we can begin finding the amount after 5.5 hours like this:

A(5.5) = A_o (1/2)^{\frac{5.5}{2.6}}

Now in order to find the percentage relative to the initial amount w can use the definition of relative change like this:

% Remaining = \frac{|A_o - A_o(1/2)^{\frac{5.5}{2.6}}|}{A_o} x100

We can take common factor A_o and we got:

% Remaining= [1-(1/2)^{\frac{t}{2.6}}]x100

And replacing the value t =5.5 hours we got:

% Remaining = [1-(1/2)^{\frac{5.5}{2.6}}]x100 =76.922\%

5 0
3 years ago
A 100- Acre almond farm in the San Joaquin Valley of California purchases irrigation water at a rate of $264 per acre-foot. An a
Alexus [3.1K]

Answer: Sample costs to produce blueberries in the southern San Joaquin Valley ... shape, immediately after planting at a rate of 100 cubic yards per acre to ... most critical period for irrigation goes from fruit expansion (April) through harvest (June). ... The cost of water includes pumping costs of $400 per acre foot or $33.33 per.

8 0
3 years ago
2.3*10^8+4.7*10^7<br><br> Express answer in scientific notation.
juin [17]

Answer:

2.3 * 80 + 4.7 * 70

Step-by-step explanation:

6 0
3 years ago
I need help please and I don't understand it
UNO [17]
The intercept is (0, -9).

This is the y-intercept. To find the x-intercept, 

5^x = 9.

(1.365, 0)
4 0
2 years ago
Whats 3,465 in expanded form
dimulka [17.4K]
3000 +400+60+5 is the answer.hope I helped you
7 0
3 years ago
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