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NeX [460]
3 years ago
7

What is the formal definition of a square ?

Mathematics
2 answers:
svlad2 [7]3 years ago
5 0

It is a quadrilateral with four equal sides.

AfilCa [17]3 years ago
3 0

A shape with 4 equal sides.

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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
How do I find B??????
yulyashka [42]

The graph shown below can be described using the equation y=Acos(bx)=k. Which of the following is the value of B +K.

I typed ur questions and this cite with problems came up. I believe ur answer is the following of ur question. Hope this helped. :)

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4 0
3 years ago
Four people each deliver food to peoples' homes. Audrey charges a flat fee of $4 for each delivery plus a certain amount, in dol
timama [110]

Answer:

4+1m??

Step-by-step explanation:

7 0
3 years ago
Now find the sum what 2 5/6 and
salantis [7]

Answer:

2 \frac{1}{5} + 1 \frac{5}{6}  =  2 \frac{6}{30}  + 1 \frac{25}{30}  \\  \\  \frac{66}{30}  +  \frac{55}{30}  =  \frac{121}{30}  \\  \\  \\  = 4 \frac{1}{30}

I hope I helped you^_^

3 0
2 years ago
Help plz:) photo attached
bonufazy [111]

Answer:

y=5x+25

Step-by-step explanation:

Since the y intercept for the scatterplot is 25, that means that the only equation that matches the graph is y=5x+25

y=5(0)+25

y=0+25

y=25

7 0
3 years ago
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