In 1985,there were 285 cell phone subscribers in the small town of centerville. The number of subscribers increased by 75% per year after 1985.How many cell phone subscribers were in centerville in 1994?

Therefore there were 43,872 cell phone subscribers in Centerville in 1994.

Step-by-step explanation:

Given that, in 1985 , the number of cell phone sub subscribers was 285 in the small town Centerville.

The number of subscribers increased by 75 % per year after 1985.

The number of subscribers increased per year, to find the number of subscriber we have to use compound formula.

Here A = ?

P= 285

r= 75%

n=(1994-1985) year= 9 year

        ≈43,872

Therefore there were 43,872 cell phone subscribers in Centerville in 1994.

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

a is the right answer