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Papessa [141]
2 years ago
12

the half -life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mas

s. starting with 155 gramsbof a radioactive isotope, how much will be left after 3 half-lives?​
Mathematics
1 answer:
SVETLANKA909090 [29]2 years ago
7 0

Answer:

after 3 half lives the amount should be reduced to 19.375g

Step-by-step explanation:

after the first half life , amount left =

155÷2

= 77.5g

2nd half life

77.5÷2

=38.75g

3rd Half life

38.75÷2

=19.375g

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It's false, because if x^2=16, then x=4 \vee x=-4
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3 years ago
(05.06)Keisha ran to swim practice but needed to stop by her friend Natasha’s house on the way. She stayed at Natasha’s house fo
Ugo [173]

The graph third represents the provided situation first line increases and then constant then again increases and becomes constant.

<h3>What is a line graph?</h3>

A line graph is a graph made up of segments of straight lines that connect the depicted data points.

We have:

Keisha ran to swim practice but needed to stop by her friend Natasha’s house on the way. She stayed at Natasha’s house for 15 minutes, and together they ran the rest of the way to practice, where they stayed for 1 hour.

Based on the information given we can say graph third represents the situation.

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Again they both ran so line increases.

Then they both stayed for 1 hour, so the line should be constant.

Thus, the graph third represents the provided situation first line increases and then constant then again increases and becomes constant.

Learn more about the line chart here:

brainly.com/question/23680294

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7 0
2 years ago
How do you find the slope intercept form for Y=10-(4x+8)
Solnce55 [7]
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3 0
3 years ago
Elena has bought 320 tropical fish for a museum display. She bought 7 times as many triggerfish as parrotfish. How many of each
STALIN [3.7K]
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8 0
3 years ago
............Find .....X......
LiRa [457]

Answer:

x=50

Step-by-step explanation:

(x-10)+x+90=180

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<u><em>x=50</em></u>

4 0
2 years ago
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