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Mrac [35]
2 years ago
6

Nora's math teacher said that each question answered correctly on a test would be

Mathematics
1 answer:
lbvjy [14]2 years ago
8 0

Answer:

add one please i wanna help!

Step-by-step explanation:

You might be interested in
Please explain I really need help
velikii [3]

Answer:

1. 1343 years

2. 9 hours

3. 39 years

Step-by-step explanation:

1. Given, half-life of carbon = 5730 years.

∴ λ = 0.693/half-life of carbon = 0.693/5730 = 0.000121

If N₀ = 100 then N = 85

Formula:- N = N₀*e^(-λt)

∴ 85 = 100 * e^(-0.000121t)

∴㏑(-0.85)=-0.000121t

∴ t = 1343 years

2. Given half-life of aspirin = 12 hours

λ = 0.693/12 = 0.5775

Also N₀ = 100 then 70 will disintegrate and N = 30 will remain disintegrated.

∴ 70 = 100 *e^(-0.05775t)

0.70 = e^(-0.05775t)

㏑(0.70) = -0.05775t

∴ t = 9 hours

3.  The population of the birds as as A=A₀*e^(kt)

Given that the population of birds fell from 1400 from 1000, We are asked how much time it will take for the population to drop below 100, let that be x years.

The population is 1400 when f = 0, And it is 1000 when f = 5

We can write the following equation :

1400 = 1000e^(5t).

∴1400/1000 = e^(5k)

∴ k = ㏑(1.4)/5

We need to find x such that 1400/100 = e^(xk)

14 = e^(xk)

∴ x = 39 years

5 0
3 years ago
What is the capacity of the cube in millimeters shown in the picture????
viktelen [127]
25 there you go the answer and yourwelcome
4 0
3 years ago
What is the tangent to the circle ​
Leni [432]

Answer:

PQ

Step-by-step explanation:

TANGENT ALWAYS TOUCH TO THE CIRCUMFERENCE OF CIRCLE

7 0
3 years ago
A proportion often shows the relationship between:
tankabanditka [31]

Answer:

It compares two numbers that can represent many of things. For example, people, food & items.

Step-by-step explanation:

8 0
3 years ago
3.45 divide by 1.2 find the remainder also​
weeeeeb [17]

Answer:

2.25 it is the answer

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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