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Bumek [7]
3 years ago
12

Your friend says "Multiplying a number by 5 is a 500% increase" Describe and correct the error in your friend's reasoning.

Mathematics
1 answer:
telo118 [61]3 years ago
7 0
An increase is adding, not multiplying. they meant that 5 times a number is 500% of something. it would be a 400% increase as one plus four is five.
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The weight of a radioactive isotope was 96 grams at the start of an experiment. After one hour, the weight of the isotope was ha
zimovet [89]
The starting weight of the radioactive isotope = 96 grams

Weight after one hour is half of the starting weight. So the weight of the radioactive isotope after 1 hour = 48 grams

After 2 hours the weight is half as compared to the weight after previous hour. So weight after 2 hours = 24 grams.

This means, after every hour the weight is being halved. The half life of radioactive isotope is one hour.

Since after every hour, the weight is being halved, the weight of the isotope can be modeled by an exponential equation.

So,

Initial Weight = W₁ = 96
Change factor = 1/2 = 0.5

The general equation of the sequence will be:

\\  \\ W_{t}=96(0.5)^{t}

Here t represents the number of hours. Using various values of t we can find the weight of the radioactive isotope at that time.

We can plot the sequence using the above equation. The graph is attached below.

3 0
2 years ago
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lilavasa [31]

Answer:

13 dollars and 44 cents, 56 cents.

Step-by-step explanation:

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10b = 134.4

b = 13.44

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24c = 13.44

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so each cookie costs 56 cents

7 0
2 years ago
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Find the sum of (x+5) and (2x+3)
telo118 [61]
X+5+2x+3
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hope that was helpful! 
5 0
2 years ago
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Sandra is 4 feet tall.Pablo is 10% talker than Sandra,and Michaela is 8% taller than Pablo.Explain how to Michaelas height with
Pavlova-9 [17]

Answer:

For Pablo's height, just make 10% of 4 a decimal which is .4 and add 4 to it. and then for Michaela do the same which is .8 and add 4 to it  so 5ft for Michaela

5 0
3 years ago
What is the slope of the line passing through the points (7, 10) and (5, 16) ?<br> Thank you
butalik [34]

Answer:

m=-3

Step-by-step explanation:

m=y2-y1/x2-x1

m=16-10/5-7

m=6/-2

m=-3

4 0
2 years ago
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