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Natasha2012 [34]
2 years ago
5

Express 31/10 as a mixed number

Mathematics
2 answers:
Sphinxa [80]2 years ago
6 0
Answer is equal to 3 and 1/10
Vlada [557]2 years ago
4 0
3 1/10 because 10 can go into it 3 times
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You have 480 grams of a radioactive kind of samarium. If its half-life is 90 years,
lisov135 [29]

Answer:

120 grams will be left after 180 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

                                             N(t)=N_0(\frac{1}{2})^\frac{t}{t_{1/2}}

where,

N(t) = quantity of the substance remaining

N_0 = initial quantity of the substance

t = time elapsed

t_{1/2} = half life of the substance

From the information given we know that:

  • The initial quantity is 480 g,
  • The half-life is 90 years,
  • 180 years is the time elapsed.

And we want to find how much will be left. For this we use the above formula.

N(t)=480\left(\frac{1}{2}\right)^{\frac{180}{90}}\\\\N(t)=480\left(\frac{1}{2}\right)^2\\\\N(t)=480\cdot \frac{1}{2^2}=120

120 grams will be left after 180 years.

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3 years ago
Tristan’s fish is 1/2 yard long, 1/6 yard wide, 1/3 yard high. What should the side lengths of each cubic block used to find the
Elanso [62]
To find the volume of most objects the formula is length x width x height. So in order to find the volume you need to multiply the data.
1/2 x 1/6 x 1/3= 1/36
The volume is 1/36
6 0
3 years ago
I need some help on this if possible
Sophie [7]

where C is the circumference, d is the diameter and r is the radius.

The diameter of a circle is a line segment that passes through the center of the circle and has its endpoints on the circle. The radius of the circle is a line segment from the center of the circle to a point on the circle. The diameter of a circle is twice the length of its radius.

If you are given the diameter then use the formula C = πd

If you are given the radius then use the formula C = 2πr

Step-by-step explanation:

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2 years ago
What is 4.7 in a fraction into a simplest form
zhannawk [14.2K]

4.7 as a fraction would be 4 and 7/10 (7 over 10).

8 0
3 years ago
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Can Someone please help me?
SOVA2 [1]

Answer:

?????????????????????

4 0
3 years ago
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