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Tcecarenko [31]
2 years ago
12

What is 5.4 + (-3.6)​

Mathematics
1 answer:
masya89 [10]2 years ago
3 0

Answer:

1.8

Step-by-step explanation:

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It’s b. Cuneiform writing
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3 years ago
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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.

3 0
3 years ago
Help me out ? ty I’ll give brainliest
DaniilM [7]

Answer:

it will

Step-by-step explanation:

33.46

<em>hope</em><em> it</em><em> helps</em><em> and</em><em> your</em><em> day</em><em> will</em><em> full</em><em> of</em><em> happiness</em>

3 0
3 years ago
The area of a circle is found with the formula A = The expression is pi*r^2, where pi represents 3.14. If a tile artist is placi
alekssr [168]

Answer:

the radius is about 14.47 ft

Step-by-step explanation:

658=pi*r^2 Given

658=3.14*r^2 Substitution

209.55=r^2 Division property of equality

√209.55=√r^2 square root property of equality

the radius is about 14.47 ft

6 0
2 years ago
What is the domain and range
Rainbow [258]

Well, keep in mind that the domain of a function is the entire set of possible values of the independent variable. To make it more clear, the domain is the set of all possible x-values, which will make the function work, and with real y-values as the output. So, the range would be the set of all of the second elements of an ordered pair (y-coordinates).

If you made a T chart like the picture you have above, you would have to put x (age of person) and y (books read).

So,

x = age of person

y = books read

4 0
3 years ago
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