Answer:

Step-by-step explanation:
If x is directly proportional to y, then


where, k is constant of proportionality.
We know that,
1 miles = 1.60934 km
It is given that x-miles and y- kilometers. Constant of proportionality is 1.60934.

Hence, the required equation is
.
Relliable = 1.5 x 30=45
speedy = 1.1 x 30 +11.5= 44.50
city = 1.25x30+8=45.50
so reliable is the cheapest
Answer: i got 100% on the journal activity on EDGE with this “ The difference of piecewise functions and infinite limits is the graphs, with piecewise functions you're graphing several equations... when looking at a graph with an infinite limit there is a difference. A similarity they do have is their end points.” I haven’t been paying attention at all so this I made this up and some how it works(?!)
Step-by-step explanation: I’m not sure if it’s even correct but it worked as a response!
ANSWER

EXPLANATION
The given equation is:

We integrate with respect to t to get,

The initial condition is y(0)=20
We apply the initial condition to get,


This implies that;



Or
