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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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The two square pyramids are similar. The side length of the smaller pyramid is 3/4 the side length of the larger pyramid.
Triss [41]

Answer:9/16

Step-by-step explanation:

Since we know it's 3/4 use

r=(3/4)²  .... (\frac{3}{4} x\frac{3}{4} ) =\frac{9}{16}

3 0
3 years ago
If you have 720 pt/h how many qt/min is it
Maurinko [17]
So,

720 pt./hr.

2 pt. = 1 qt.

720/2 = 360

360 qt./hr.

Now, since there are 60 mins. in 1 hr., multiply the number by 60.

360(60) = 21600

720 pt./hr. = 21,600 qt./min.
6 0
3 years ago
M=2/5 (4,-5) point slope
KiRa [710]

Answer:

-9

Step-by-step explanation:

You take them both and multiply then divide then subtract

6 0
3 years ago
How Can associative Property be used to mentally find 48+82?
Marizza181 [45]
Associative property of addition represents this equation:
a + b = b + a
So, how would it be helpful with this given equation?
=> 48 + 82
=> Let's start with the ones place value.
(2 + 8) = 10, bring down 0, carry 1 then ( 4 + 8) = 12 + 1 = 13
So the answer is 130.
If we are going to do it vice versa, still expect that the same answer will occur.
6 0
3 years ago
Ratio 6 to 5 of 20000
neonofarm [45]

Answer:

24000

Step-by-step explanation:

6/5×20000

=24000

4 0
2 years ago
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