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2 years ago

Does anybody know this

Mathematics

1 answer:

Dmitrij [34]2 years ago

6 0

Step-by-step explanation:

The equation used to determine the amount of radioactive material left is

$A = A_0(2)^{-t/HL}$

We are have the following given quantities:

t = 30 seconds

$A_0$ = 50 grams

HL = 6 seconds

Plugging these into our equation we get

$A = (50\:\text{grams})(2)^{-(30s/6s)}$

$\:\:\:\:= (50\:\text{grams})(0.03125)$

$\:\:\:\:= 1.56\:\text{grams}$

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The part of speech helps determine

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2 years ago

What is the distance between coordinates (-6.25,5) and (-3.75,2)

Oksi-84 [34.3K]

Answer:

$\sqrt{15.25}$

Step-by-step explanation:

To find the distance, we can use the distance formula:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ when the given points are $(x_1,y_1)$ and $(x_2,y_2)$

Plug in the points (-6.25,5) and (-3.75,2)

$d=\sqrt{(-6.25-x_1)^2+(5-y_1)^2}\\d=\sqrt{(-6.25-(-3.75))^2+(5-2)^2}\\d=\sqrt{(-6.25+3.75)^2+(5-2)^2}\\d=\sqrt{(-2.5)^2+(3)^2}\\d=\sqrt{6.25+9}\\d=\sqrt{15.25}$

Therefore, the distance between the two coordinates is $\sqrt{15.25}$ , or approximately 3.91.

I hope this helps!

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2 years ago

Which of the following is equivalent to (x2+y)(y+z)? Explain your answer

PolarNik [594]

Answer:

X^2y+x^2z+y^2+yz

Step-by-step explanation:

x^2(y+z)+y(y+z)

x^2y+x^2z+y^2+yz

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2 years ago

What is the greatest common factor of 40 and 36

Kazeer [188]

Nobody goes around with lists of greatest common factors in their head.
When we need to know one, we grab the nearest pencil and work it out.

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40 .

The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36 .

The common factors of 35 and 40 are 1, 2, and 4 .

The biggest one is 4 .

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3 years ago

Read 2 more answers

What is 3 1/8 - 1/2

irina1246 [14]

Answer:

$\frac{21}{8}$