Laryngeal cancer rates in smokers is 160.0 (per 100,000) and 25.0 (per 100,000) among nonsmokers. Among smokers, what percentage of laryngeal cancer cases are due to the exposure (smoking)?

0.16%

Step-by-step explanation:

From the statement of the question;

Number of Laryngeal cancer due to smoking = 160

Population of smokers = 100,000

Hence the percentage of smokers liable to have Laryngeal cancer = 160/100000 ×100/1

=0.16%

Hence 0.16% of smokers are liable to Laryngeal cancer

The price is increasing by 65% per year.

Step-by-step explanation:

Since, the exponential growth function,

Where,

a = initial value,

r = rate of increasing per period,

x = number of periods,

Here, the given function,

Where,

t = number of years,

By comparing,

r = 0.65,

i.e. the rate of increasing per year = 0.65 = 65%