The population of a town doubled every 5 years from 1960 to 1975. What is the percentage increase in population in this period ?

800%

Step-by-step explanation:

Let p represent the population

in 1965 → the population becomes 2p

in 1970 → the population becomes 2(2p) = 4p

in 1975 → the population becomes 2(4p) = 8p

p  ——————> 100%

8p  ————-—-> x%

then

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

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