Answer:

Step-by-step explanation:
One Hour:
Salad=40
Sandwich=19
Total work time
Generally
Time to make 30 sandwiches is


Therefore
Bill has 7-1.6 hours to make salads and can make x about of salads in



Answer:
a, b, d and f
Step-by-step explanation:
To find which equation will have a a mass less than 50 mg after 2 hours, we just need to use the value of x = 2 and then verify if the values of y are less than 50:
a. y = 100*(0.5)^2 = 25 -> apply
b. y = 500*(0.3)^2 = 45 -> apply
c. y = 80*(2)^2 = 320 -> doesn't apply
d. y = 10*(1.2)^2 = 14.4 -> apply
e. y = 30*(1.5)^2 = 67.5 -> doesn't apply
f. y = 80*(0.2)^2 = 3.2 -> apply
g. y = 100*(2)^2 = 400 -> doesn't apply
Let's suppose we want to solve

with

. Separating variables and integrating, we get

Leaving the solution in this form, the initial condition gives

This means the solution is

.
Now if we were to write

, then we would have found

so that the solution would have been

.
But these two solutions are the same, since

. So we get the same solution regardless of where we place

, despite getting different values for

.