Answer:
use
Step-by-step explanation:
calculator
1st worker produced x pants,
2nd worker produced (x+8) pants.
x+x+8=86
2x=78
x= 39
x+8 = 39+8 = 47
1st worker produced 39 pants,
2nd worker produced 47 pants.
Answer:
2 hours
Step-by-step explanation:
Since he gets 59.50 every hour you'll need to see how much 59.50 can go into 110$
So, 110/59.50 = 1.8487395
You can then round this number up.
Since he's paid by the hour he'll need to work 2 hours but he'll still have a bit of money left over
Supposing that the trail mix was 5/8 pound, and Lisa gave 1/8 pound, then to know what is left we only have to subtract those fractions:
5/8 - 1/8 = 4/8
that is because we only subtract the numerators (upper part) of the fractions due to the fact that the denominators are equal, now, 4/8 can also simplify to 1/2
therefore there are left 4/8 pound of trail mix or, what is the same, 1/2 pound of it
Answer:
Where 
represent the half life and the intial amount would be 
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay
Step-by-step explanation:
For this case we can define the variable of interest amount of Pb209 and for the half life would be given:
Where represent the half life and the intial amount would be
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay
