Answer:
Answers: 1), 2), 3).
Step-by-step explanation:
Note that when we say , we mean "as x tends to a from the left hand side". That is, what is the function doing when "x approaches a from the left side". In much the same way, we say to imply what the function is doing when "x approaches from the right side".
So, when , we are looking at the point around x = 3, but from the left side. From the graph, we see that, from the left side of 3, the graph is approaching a fairly big number. So, we see that: "As , ".
In much the same way:
"As , ".
"As , ".
Step-by-step explanation:
3cm on map = 45 km
1 cm on map = Xkm
Xkm = 45 / 3
Xkm = 15km
Therefore scale = 1:15000
Answer: quick mix is better
13.50+6.90(4)= 41.1
7.20+7.20(4)+5.90=41.9