Answer:
110
Step-by-step explanation:
well if she has 35 in her account already and she babysits for 3 weeks and makes $25 each week that would be 25 times 3 or 25+25+25=75 then you would add 75 to 35 witch is 110
Answer:
First you will want to turn 15% into a decimal, then you will subtract the decimal from 50. Hope this helped
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
The complex number z = a + bi is made up of 2 parts
a ← the real part and
bi ← the imaginary part ( always with the i in it )
given z = - 60i + 80
real part = 80 and imaginary part = - 60i
Your answer is going to be roughly 9.3327
Answer:
Step-by-step explanation:
concentration = amount of salt/solution
A) Initial concentration= 90/1000 = 0.09
Q = quantity of salt
Q(0) = 90 kg
Inflow rate = 8 l/min
Outflow rate = 8 l/min
Solution = 1000 L at any time t.
Salt inflow = 0.045 * 8 per minute
= 0.36 kg per minute
This is mixed and drains from the tank.
Outflow =
Thus rate of change of salt
Q'(t) = inflow - outflow =
Separate the variables and integrate
Use the fact that Q(0) = 90
90 = 360-A
A = 270
So
B) Q(t) = 360-270e^-0.004 = 91.07784
C) When t approaches infinity, we get
Q(t) tends to 360
So concentration =360/1000 = 0.36