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liubo4ka [24]
3 years ago
7

Element X is a radioactive isotope such that every 20 years, its mass

Mathematics
1 answer:
faust18 [17]3 years ago
3 0

Answer:

12.1

Step-by-step explanation:

y=a(1/2)^t/h

270=410(1/2)^t/20

Divide both sides by 410

0.6585365854 = (1/2)^t/20

Log Both sides

Log(0.6585365854) / Log(1/2)

.6026645024= t/20

20 x .6026645024 = t

12.05329005 to the nearest tenth is 12.1 = t

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B: 36% i hope i helped u out
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3 years ago
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Suppose we are given the following information.
Minchanka [31]

Since the product of the slope is -1, hence the lines are perpendicular

<h3>Parallel and Perpendicular lines</h3>

Two lines are known to be parallel if they have the same slope while if two lines are perpendicular if the product of the slope is -1

Given the coordinates of line 1 passing through (0, 6) and (6, 4), the slope is given as;

Slope = 4-6/6-0
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Similarly for the coordinate points (-1, -7) and (1, -1).

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Learn more on parallel and perpendicular lines here: brainly.com/question/25429151

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5 0
2 years ago
Maria is 12 years older than Jose. In 9 years Maria will be twice as old as Jose.
Stella [2.4K]
I would have to say
Maria is 21
Jose 9
If Maria was 12 and Jose wasn’t born yet look at their ages in nine years.
Hope this helped.
5 0
2 years ago
HELP PLEASE! Thank you
Lostsunrise [7]

Answer:

2000

Step-by-step explanation:

Hello,

A or C means 2 ways

and then a digit means 10 ways 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

so in total we have 2*10*10*10 = 2000 possible codes

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3 years ago
What is the area of the following circle?
Svetradugi [14.3K]

Answer:

78.54

Step-by-step explanation:

Area = 3 . 14 X 5 X 5

= 78.54

6 0
3 years ago
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