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Inessa [10]
2 years ago
12

suppose a radioactive substance decays according to the equation y=200e^-0.75t, where y represent the mass in gram after t hours

. calculate the mass of the substance after 3.5 hours have elapsed​
Mathematics
1 answer:
Daniel [21]2 years ago
4 0

Answer:

i am not sure

Step-by-step explanation:

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The diameter of a semicircle is 8 kilometres. What is the semicircle's perimeter?
Andrei [34K]

Answer:

4pi + 8 km

Step-by-step explanation:

the circumference of teh circle is d*pi = 8pi. since this is a semicircle the circumference is 4pi. then the perimeter is 4pi + 8

7 0
2 years ago
Which phrase best describes the translation from the group y=2x^2 to the graph of y= 2x^2 +5
dsp73

Answer:

The graph move up 5.

Step-by-step explanation:

When we add a constant to the end of a parabola, it shifts the graph up and down. Since the constant here is positive, the graph moves up by that number (5)

7 0
2 years ago
Simplify this expression, you are y years old. Your sister is 3 years older than you. Your uncle is 4 times older than your sist
uysha [10]

Answer:The simplified expression that represents the uncle's age is

4y + 12

Step-by-step explanation:

Let y represent your age.

Your sister is 3 years older than you. This means that your sister's age is y + 3

Your uncle is 4 times older than your sister. It means that the age of your uncle would be

4(y + 3)

The simplified expression that represents your uncle's age would be

4y + 12

8 0
3 years ago
Increase 12 in to the given ratio of 4:3​
inysia [295]

Answer:

16:12

Step-by-step explanation:    

                   (4+12)=16

16/4 = 4

4x3=12

    Another method:

4---------3

16-------x

Cross multiplication

4x=16x3

4x=48

x=12

4 0
2 years ago
Determine whether the slope line is positive or negative and then find the slope of each line?
goldenfox [79]
I he slope line is negative
5 0
2 years ago
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