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katrin [286]
2 years ago
7

If 8 g of a radioactive substance are present initially and 2 yr later only 4 g remain, how much of the substance will be presen

t after 5 yrs?
Mathematics
1 answer:
My name is Ann [436]2 years ago
7 0

Answer:

none

Step-by-step explanation:

8-4=4

if every 2 years, 4 gallons disappear

then every 1 year, 2 gallons disappear

meaning that by 5 years there will be no substance left.

(5*2=10)

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Eight year-old Alex is learning to ride a
cestrela7 [59]

Answer:

The age of the horse, in human years, when Alex was born can be determined by simply deducting the Current age of Alex from the Current age of the horse in human years.

Therefore, the age of the horse, in human years, when Alex was born was 42 years.

Step-by-step explanation:

Current age of Alex = 8

Current age of the horse in human years = 50

Since the age of the horse is already stated in human years, it implies there is no need to convert the age of the horse again.

Therefore, since Alex is a human who was born 8 years ago, the age of the horse, in human years, when Alex was born can be determined by simply deducting the Current age of Alex from the Current age of the horse in human years as follows:

The age of the horse, in human years, when Alex was born = 50 - 8 = 42

Therefore, the age of the horse, in human years, when Alex was born was 42 years.

This can be presented in a table as follows:

                               Age of Alex        Age of the Horse (in human years)

Eight years ago              0                                           42

Current age                    8                                           50

6 0
3 years ago
Liam is setting up folding chairs for a meeting. If he arranges the chairs in 4 rows of the same length, he has 9 chairs left ov
Charra [1.4K]
The answer is 32, depending on how you do the math will be different outcomes
5 0
3 years ago
A=244in2<br> H=<br> B=12.6in<br> (1in=2.54cm)
pshichka [43]
Although there is no picture, I will assume this is a triangle we are talking about since the terms base and height are being used. If that is the case, the height is roughly 38.72in. 

To find this, we will use the area of a triangle formula. 

1/2bh = a ---> plug in known values. 
1/2(12.6)(h) = 244 ---> multiply to simplify
6.3(h) = 244 ----> divide both sides by 6.3
h = 38.73
6 0
3 years ago
Emilio throws a marshmallow into the air from his balcony. The height of the marshmallow (in feet) is represented by the equatio
Murrr4er [49]

Answer:

b trust me

Step-by-step explanation:

trust

8 0
3 years ago
I do not get how to do Simpliflyng Radicals.
Alex_Xolod [135]
First step: Find out the prime numbers that make up the radical, for example, 120 would be 2x2x2x5x3
Second step: If there is 2 of the same number that repeats just put that number in the front of the resulting radical
Third: Just multiply the remaining radicals together and put the number in front of it.
Now you have
2 \sqrt{30}
5 0
2 years ago
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