8n-28
4(2n-7)
you cant factor this. There are no powers
Answer:
the container is 1/4 full at 9:58 AM
Step-by-step explanation:
since the volume doubles every minute , the formula for calculating the volume V at any time t is
V(t)=V₀*2^-t , where t is in minutes back from 10 AM and V₀= container volume
thus for t=1 min (9:59 AM) the volume is V₁=V₀/2 (half of the initial one) , for t=2 (9:58 AM) is V₂=V₁/2=V₀/4 ...
therefore when the container is 1/4 full the volume is V=V₀/4 , thus replacing in the equation we obtain
V=V₀*2^-t
V₀/4 = V₀*2^-t
1/4 = 2^-t
appling logarithms
ln (1/4) = -t* ln 2
t = - ln (1/4)/ln 2 = ln 4 /ln 2 = 2*ln 2 / ln 2 = 2
thus t=2 min before 10 AM → 9:58 AM
therefore the container is 1/4 full at 9:58 AM
Answer:
15
Step-by-step explanation:
First we need to remove the parenthesis
4 + 37 + 8 - (34)
4 + 37 + 8 -34
Add 4 and 37
41 + 8 - 34
Add 41 and 8
49 - 34
Subtract
15
Answer:
Step-by-step explanation:
Given
Required
This is calculated as:
Since it is a selection without replacement, the computation is:
So, we have:
