we are given
f(x)=[x=1]
where bracket means ceiling functions
we know that
Ceiling function returns the least value of the integer that is greater than or equal to the specified number
so, we can check each options
option-A:

At x=-4:
f(x)=[-4-1] =-5
For x<-3:
Let's assume
x=-3.1
f(x)=[-3.1-1] =[-4.1]=-5
so, this interval is TRUE
option-B:

At x=-2:
f(x)=[-2-1] =-3
For x<-1:
Let's assume
x=-1.1
f(x)=[-1.1-1] =[-2.1]=-3
so, this is FALSE
Answer:
$ 71.5
Step-by-step explanation:
firstly kilometer to meters
<em>1 km = 1000 m </em>
therefore 3 km = 3000m
for the first 500 = $40
hence deduct the 500 from 3000m
3000 - 500 = 2500
now find out how many 300m go into 2500
2500 / 300 = 8.33
which is rounded up to 9
therefore the total amount is :
40 + 9 * 3.5
<u>= $71.5</u>
<u></u>
Thats easy. figure it out