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GREYUIT [131]
3 years ago
15

Alexander Litvinenko was poisoned with 10 micrograms of the radioactive substance Polonium-210. Since radioactive decay follows

a compounded continuously model, we can determine the amount of substance left in Alexander Litvinenko's body at any given time. If Polonium-210 has a decay rate of .502%, then determine the amount of Polonium-210 left in his body after 40 days. Provide 3 decimal places and units in your answer.
Mathematics
1 answer:
Artist 52 [7]3 years ago
7 0

Answer:.

Step-by-step explanation:

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The length of one of the sides of a regular hexagon is 7.8cm, find the perimeter of this polygon​
fredd [130]

Answer:

46.8 cm

Step-by-step explanation:

A hexagon has six sides. If it is a regular hexagon, then it is equilateral, meaning that each side is the same length. If one side is 7.8cm, then all sides will be 7.8cm. You can find the perimeter by adding 7.8 six times, or multiplying 7.8 by six.

7.8 · 6 = 46.8

hope this helps!

6 0
3 years ago
American eat an average of 100 acres of pizza per year this is equivalent to 4,356,000 square feet of pizza per year how is area
Kamila [148]

Answer:

4.356 × 10⁶ square feet or 4.356 × 10⁶ ft² of pizza per year

Step-by-step explanation:

Scientific notation is a means, method or way that is used in mathematics to write very large or small real numbers in a very short form or compressed form.

Scientific notation uses exponents or 10 raised to the power of a particular number to write huge or small real number in a decimal form.

In the question, we are asked to express the area in square feet as a scientific notation.

The area = 4,356,000 square feet of pizza per year

4,356,000 square feet of pizza per year in scientific notation =

4.356 × 10⁶ square feet of pizza per year.

5 0
3 years ago
Peter jogs 3 miles in 27 minutes.<br> Find the unit rate in minutes per mile.
padilas [110]

Answer:

9 minutes per mile.

Step-by-step explanation:

3 miles takes 27 minutes, so:

1 mile takes 27/3 = 9 minutes.

5 0
3 years ago
Read 2 more answers
Which expression is equivalent to the given expression?
Feliz [49]
Your answer would be D. x(13 - 29).
I hope this helps love! :)
8 0
3 years ago
Read 2 more answers
What percent of 350 is 252
7nadin3 [17]
To solve this you can make a perportion

252     x 
----- = -----
350     100

and solve 252 times 100/350=72

252 is 72% of 350
5 0
3 years ago
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