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GarryVolchara [31]
3 years ago
10

There was a sample of 200 milligrams of a radioactive substance to start a study. since then, the sample has decayed by 5.4% eac

h year. let t be the number of years since the start of the study. let y be the mass of the sample in milligrams. write an exponential function showing the relationship between y and t .
Mathematics
1 answer:
abruzzese [7]3 years ago
5 0
For this case we have a function of the form:
 y = A * (b) ^ t
 Where,
 A: initial amount
 b: decrease rate
 t: time
 Substituting values we have:
 y = 200 * (0.946) ^ t
 Answer:
 
An exponential function showing the relationship between and and is:
 
y = 200 * (0.946) ^ t
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Answer:

Jamar is correct.

Step-by-step explanation:

The scores are as follows :

−3, 2, 0, −1, 2, −4.

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Here, amar says these numbers can all be described as integers, while Sophia says they are whole numbers.

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3 years ago
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vichka [17]

4 cos² x - 3 = 0

4 cos² x = 3

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Fixing the squared cosine doesn't discriminate among quadrants.  There's one in every quadrant

cos x = ± cos(π/6)

Let's do plus first.  In general, cos x = cos a has solutions x = ±a + 2πk integer k

cos x = cos(π/6)

x = ±π/6 + 2πk

Minus next.

cos x = -cos(π/6)

cos x = cos(π - π/6)

cos x = cos(5π/6)

x = ±5π/6 + 2πk

We'll write all our solutions as

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3 0
3 years ago
PLEASE HELP ASAP DUE IN 3 MINUTES
Inga [223]

Answer:

<u>1728 in²</u>

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For the height, you would need to do: 144 - 36 - 24 - 36 = <u>48 inches</u>

For the base, you would need to do: 60 - 24 = <u>36 inches</u>

Now you multiply the base and height to get the area: 48 x 36 = <u>1728 in²</u>

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3 years ago
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