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Alex17521 [72]
3 years ago
12

2 and 2/3 plus 1 and 1/2

Mathematics
2 answers:
kari74 [83]3 years ago
6 0
Hi there!

2 2/3 + 1 1/2 = 4 1/6

Hope this helps!
kolezko [41]3 years ago
4 0
The answer is 11/6 (or 1 5/6 if you simplify)

2 2/3 + 1 1/2 = 11/6
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A radioactive substance decays exponentially. A scientist begins with 190 milligrams of a radioactive substance. After 19 hours,
Lelu [443]

Answer:

  51 milligrams

Step-by-step explanation:

Exponential growth or decay can be modeled by the equation ...

  y = a·b^(x/c)

where 'a' is the initial value, 'b' is the "growth factor", and 'c' is the time period over which that growth factor applies. The time period units for 'c' and x need to be the same.

In this problem, we're told the initial value is a = 190 mg, and the value decays to 95 mg in 19 hours. This tells us the "growth factor" is ...

  b = 95/190 = 1/2

  c = 19 hours

Then, for x in hours the remaining amount can be modeled by ...

  y = 190·(1/2)^(x/19)

__

After 36 hours, we have x=36, so the remaining amount is ...

  y = 190·(1/2)^(36/19) ≈ 51.095 . . . . milligrams

About 51 mg will remain after 36 hours.

8 0
2 years ago
Help me with this please!
erastova [34]
7 Miles Per Hour Is The Answer.
3 0
4 years ago
Eya is 5 years younger than 3 times Bills age. If Eya is 28 how old is Bill?
Sedaia [141]
Bill's age = x

Eya's age = 3x - 5

Eya is 28

28 = 3x - 5

28 (+5) = 3x -5 (+5)

33 = 3x

33/3 = 3x/3

x = 11

Bill = x

x = 11

Bill is 11 years old

hope this helps
4 0
4 years ago
If -a=b and a+c=d then b+c=d
Effectus [21]
This is incorrect

-a = b
a + c = d
b + c = d is incorrect because it says a + c and not -a + c.

If you multiply the first line with -1 then you would get a = -b
So the final line would actually be -b+c=d
3 0
3 years ago
280 students went on a field trip. 5 buses were filled and 10 students traveled in cars. How many students were in each bus?
mylen [45]

Answer:280-10/5 (everything over/divided by 5)

Step-by-step explanation:

280 is all the students 10 go in car so subtract that and divide the answer by 5.

6 0
3 years ago
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