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steposvetlana [31]

2 years ago

10

The half-life of a radioactive kind of antimony is 60 days. If you start with 720 grams of it, how much will be left after 180 d

ays?

2 answers:

dimaraw [331]2 years ago

6 0

HALF-LIFE Equals is 30

Marat540 [252]2 years ago

3 0

The answer would be 90 because it takes 60 days to become a half-life so the the half of 720 is 360 the 180 then 90

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If in one year a city recorded a total of 97 rainy, how many of the days did it not rain?

Shalnov [3]

1 year = 365 days

365 -97 = 268

it did not rain 268 days

3 0

3 years ago

What is the median for the following scores for Mrs. Johnson's first test? 59, 22, 87, 44, 96, 38, 70, 85, 79

katrin2010 [14]

To work out the median, you need to numerically sort the data (because currently, it's unordered).

The ordered set of data is: 22, 38, 44, 59, 70, 79, 85, 87, 96

Now you just need to pick the middle value, which is 70:

(as you can see: 22, 38, 44, 59, 70, 79, 85, 87, 96)

Therefore, your answer is 70 :)

8 0

2 years ago

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The perimeter of a square piece of gold is 60 millimeters. How long is each side of the piece of gold?

anyanavicka [17]

Answer:

just divide 60 millimeters by 4

7 0

2 years ago

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dangina [55]

$\bf \textit{arc's length}\\\\ s=\cfrac{\theta \pi r}{180}~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad degrees\\[-0.5em] \hrulefill\\ r=6.5\\ s=5.7 \end{cases}\implies 5.7=\cfrac{\theta \pi (6.5)}{180}\implies 1026=6.5\pi \theta \\\\\\ \cfrac{1026}{6.5\pi }=\theta \implies \stackrel{\textit{rounded up, using }\pi =3.14}{50.27=\theta }$

3 0

2 years ago

Determine whether the ffunction X/(x^2-1) is odd even or neither

djyliett [7]

equation is:

$f(x) = \frac{x}{ {x}^{2} - 1 }$

so if its even f(-x) should be equal to f(x)

that means

$f( - x) = \frac{ - x}{ {( - x)}^{2} - 1} \\ \\ f( - x) = - \frac{ x}{ {x}^{2} - 1}$

so f(x) is not equal to f(-x) so its not even

If its odd than f(-x) should be equal to -f(x)

$- f(x) = - ( \frac{ x}{ { x}^{2} - 1 } ) \\ - f(x) = - \frac{ x}{ {x}^{2} - 1 }$

so as we can see f(-x)= - f(x)

so the function is odd

Ans:function is odd and not even

3 0

2 years ago