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Zina [86]
3 years ago
13

Use the fact that the quantity of a radioactive substance after t years is given by

Mathematics
1 answer:
AURORKA [14]3 years ago
6 0

Answer:

  50 kg

Step-by-step explanation:

Put the given numbers into the given formula and do the arithmetic.

  q = q0(2^(-t/k))

  q = (87 kg)(2^(-20/25)) = (87 kg)(0.574349)

  q ≈ 50 kg

The amount remaining after 20 years is about 50 kg.

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Find the area of this shape. Correct answer will Brainliest
Iteru [2.4K]

Answer:

As shown in picture, this is a trapezoid.

The area of a trapezoid is calculated by:

A = (base1 + base2) x height x (1/2)

To work out A, we need to find out base1, base2, and height.

base1  = YZ = \sqrt{(Zx - Yx)^{2} + (Zy - Yy)^{2} } = \sqrt{(5 - 2)^{2} + (5 - 5)^{2} } = 3

base2 = XW =\sqrt{(Wx - Xx)^{2} + (Wy - Xy)^{2} } = \sqrt{(8 - 1)^{2} + (1 - 1)^{2} } = 7

Otherwise, the height (distance between base1 and base2) is 4 as shown in picture.

=> A = (3 + 7) x 4 x (1/2) = 20

Hope this helps!

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6 0
3 years ago
Kelly had one liter of soda she divided equally into 10 classes to share with her friends how much total did each friend get.: 1
xxMikexx [17]

Answer:

1 decilitre  

Step-by-step explanation:

You can look up charts for these. Look up litre chart

7 0
2 years ago
Great Grizzly Park sells adult tickets at price x and tickets for children 12 and under at price y. The total charge for 3 adult
alexgriva [62]

Answer:

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3 years ago
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3 years ago
Select all the terms that are like terms.
timama [110]

Answer:

-8 x2

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x2

Step-by-step explanation:

Like terms are those which have the same variable. For example x²= x ² but x³≠x² functions having the same variable are called like terms. Terms vary with the change in exponents.

-8 x2

1.25 x2

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These three are like terms because they have the same variable with the same exponent.

The following are not like terms. They are unlike terms each having a different variable with a different exponent.

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4 x

5

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Unlike terms :5 yx2             -3.4 x3           4 x                   5

6 0
3 years ago
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