Answer:
23
Step-by-step explanation:
Answer:
a)
b)
Step-by-step explanation:
By definition, we have that the change rate of salt in the tank is , where is the rate of salt entering and is the rate of salt going outside.
Then we have, , and
So we obtain. , then
, and using the integrating factor , therefore , we get , after integrating both sides , therefore , to find we know that the tank initially contains a salt concentration of 10 g/L, that means the initial conditions , so
Finally we can write an expression for the amount of salt in the tank at any time t, it is
b) The tank will overflow due Rin>Rout, at a rate of , due we have 500 L to overflow , so we can evualuate the expression of a) , is the salt concentration when the tank overflows
The square blanket has 4 sides and all sides are equal.
Length of East side of the blanket = 72 inches
The ribbon will cover all the four equal side.
Then the length of ribbon needed by Risa to cover all sides of the blanket = (72*4) inches
= 288 inches.
There’s no picture, attach it so i can help