a-coffee-shop-charges-for-wi-fi-access-based-on-the-time-used-the-graph-of-the-c

Question

A coffee shop charges for Wi-Fi access based on the time used. The graph of the charge function cc for 0≤t≤400 ≤ t ≤ 40 is given below. Write the intervals of continuity of cc.

Accepted Answer

(0,10]∪(10,20]∪(20,30]∪(30,40]\left(0,10\right\rbrack\cup\left(10,20\right\rbrack\cup\left(20,30\right\rbrack\cup\left(30,40\right\rbrack

Answer

(0,10)∪(10,20)∪(20,30)∪(30,40)\left(0,10\right)\cup\left(10,20\right)\cup\left(20,30\right)\cup\left(30,40\right)

Answer

(0,20]∪(20,40]\left(0,20\right\rbrack\cup\left(20,40\right\rbrack

Answer

(0,10]∪(10,20]∪(20,40]\left(0,10\right\rbrack\cup\left(10,20\right\rbrack\cup\left(20,40\right\rbrack