What is "business hours"?

English Language Tests, Intermediate level

ESL/EFL Test #179 [color=blue]“Doing business: expressions with the word ‘business’”, question 4

The Virginia G. Piper Cancer Center are 8 am through 5 pm Monday through Friday.

(a) business hours
(b) business cards
© business suits
(d) business parks

English Language Tests, Intermediate level

ESL/EFL Test #179 [color=blue]“Doing business: expressions with the word ‘business’”, answer 4

The Virginia G. Piper Cancer Center business hours are 8 am through 5 pm Monday through Friday.

Correct answer: (a) business hours
[size=200]_________________________[/size]

I didn’t understand this sentece

.
Which part do you not understand?
.

are 8 am through 5 pm Monday through Friday, can I say it also this way:
are from 8 am to 5 pm from Monday to Friday ?
thanks

Yes, you can.
Use of ‘through’ is a American English.
British English would use ‘from… to’ as you suggest.