A computer interface for a digital studio piano haseighteightmicroswitches that can be set in either the "on" or "off" position. These switches must be set properly for the interface to work. Answer

A computer interface for a digital studio piano has

eighteight

microswitches that can be set in either the  "on" or  "off" position. These switches must be set properly for the interface to work. Answer questions  (a) and  (b).

a. In how many different ways can this group of switches be set?

different ways. If it takes

55

minutes to set the switches and test to see if the interface is working properly, what is the longest possible time that it would take to find the proper settings by trial and error? Choose the correct answer below.

A.over

1 comma 2801,280

hours

B.over

2222

hours

C.over

2121

hourss

D.over

4444

hours