Question

I need help quick, I have had trouble with step functions and how to graph them, problem is in attachment.

Answer 1

Here's the problem

Answer 2

any idea?

Answer 3

No, I'm sorry, I feel like the solution should be much simpler than the options given. After all it is asking for the function which should be c(d) = 125d, in which the cost is multiplied by the number of days rented

Answer 4

I'm honestly lost when it comes to step function and would like to learn, so don't just give me the answer please.

Answer 5

oh, to me, it is d

Answer 6

What does the whole [[d - 1]] mean?

Answer 7

it says c(d) = 125 *d if [d]=d
meant if d is the whole day. for example, if d is 3 or 4 days then the price is 125*3 or 125*4 respectively

Answer 8

the next solution is c(d) =125 8(d-1) if [d]<d
that means for example, if your rent just 3 days and a half( 3,5)

Answer 9

Okay, so it means the entire period of the day multiplied by the cost to rent the car after day 1.

Answer 10

then [3,5] = 3 , they just calculate 3 days, that is why d-1 there

Answer 11

Okay, thank you! I try with math, but it isn't my best subject...:}

Answer 12

Confirm [[ d]] is floor or ceiling function? I calculate it as floor.

Answer 13

Yes, it is floor.

Answer 14

ok, so I am good

Answer 15

Yes, thank you so much!

Answer 16

np