Answer:
7
Step-by-step explanation:
In similar triangles, corresponding elements are proportional. Then we get,
(2x + 1)/(x-1) = 10/4
4(2x +1) = 10(x-1)
8x + 4 = 10x - 10
8x = 10x - 14
2x = 14
x = 7
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Answer : The substances half life in days is, 5.6 days.
Step-by-step explanation :
Half life : It is defined as the amount of time taken by a radioactive material to decay to half of its original value.
All radioactive decays follow first order kinetics.
The relation between the half-life and rate constant is:

where,
k = rate constant = 0.1235 per days
= half-life
Now put all the given values in the above formula, we get:


Thus, the substances half life in days is, 5.6 days.
You solve by useing the formula (b/2) ^2
And your answer is x= 3,1
The answer is the function is not one to one
Answer:
There are 1,680 Girls
Step-by-step explanation:
1 ratio = 240
5 ratio = 1,200
7 ratio = 1,680
Therefore, 5:7 = 1,200 : 1,680