Answer:
A
D
Step-by-step explanation:
because first street intersect 2 and 3
...
and second street is parallel to third street
Answer:
4.101 yrs
Step-by-step explanation:
Given that a sample of radioactive substance to decay has the following exponential function.

where t= no of years lapsed
When t=0 i.e. initially we have population as

When it becomes half we have
=
Taking log to base e we have

In approximately 4.101 years the population decays to half