Is 1 turns in to 3 then 10 turns I. To 30 cuz 1x3=3 and 10x3=30
Here is the answer to Question 13
<em><u>Question:</u></em>
If (x + 2)/2 = y /5, then which of the following must be true?
x/2 = (y-2)/5
x/2 = (y-5)/5
(x+2)/5 = y/25
<em><u>Answer:</u></em>
<em><u>The true is:</u></em>

<em><u>Solution:</u></em>
Given that,

The above expression can be rewritten as:

Move the constant 1 from left side of equation to right side of equation

Simplify the right side of equation by making the denominator same

Thus
is true
Answer:
ON ATTACHMENT
Step-by-step explanation:
Plugin values of x:



Hope it Helps!
See attachment below:
Ok
A=P(1/2)^(t/h)
A=amount final
P=initial amount
t=time elapsed
h=time of half life
so
given h=13
and initial =48g
and final is 12g
12=48(1/2)^(t/13)
divide both sides by 48
1/4=(1/2)^(t/13)
what a coincidence
(1/2)^2=(1/2)^(t/13)
so
2=t/13
26=t
26 hours have passed