Answer:
Step-by-step explanation:
For this case the solution flows at a rate of 2L/min and leaves at 1L/min. So then we can conclude the volume is given by
Since the initial volume is 10 L and the volume increase at a rate of 1L/min.
For this case we can define A as the concentration for the salt in the container. And for this case we can set up the following differential equation:
Because at the begin we have a concentration of 8 gr/L and would be decreasing at a rate of
So then we can reorder the differential equation like this:
We find the solution using the integration factor:
And then the solution would be given by:
And if we simplify this we got:
And after do the integral we got:
And using the initial condition t=0 A= 20 we have this:
So then we have this function for the solution of A:
And now replacinf t= 40 we got:
For the first one, you're answer would be AC. since C is also a right angle, and angle A is hypnotenuse to C
Answer:
C and G
Step-by-step explanation:
just use the circumference formula
C=2piR
Answer:
$1.93 per quart
Step-by-step explanation:
There are 4 quarts in a gallon and the jug of juice is 3 gallons.
4 * 3 = 12
Thus we have 12 quarts for a price of 23.16. If we divide the price by the quarts, we get price per quart.
23.16/12 = 1.93
Price per quart is $1.93