Answer:
161700 ways.
Step-by-step explanation:
The order in which the transistors are chosen is not important. This means that we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

In this question:
3 transistors from a set of 100. So

So 161700 ways.
2: 17.5 years. Work; 12 months in one year, 210 months divided by 12 months= 17.5 years.
P V q = T V F = T
so, pVq is true.
Answer:
has 3 significant figures
Step-by-step explanation:
because zeros are counted if they are between the numbers