I need a picture to answer sorry :c
Answer:
n=3
Step-by-step explanation;
36n^2=4
n^2=4/36
n^2=1/9
to make 9 a numerator take the reciprocal of 1/9
n^2= -9
take square root on both sides
n=3
1 ft= 12 inches
9 ft= 108 inches
ratio 12/108=1/9
doesn't matter the unit used as long as the are the same inches:inches or ft:ft
the ratio is still 1:9
hope this answers your question
Sa=4pir^2
100pi=4pir^2
divide both sides by 4pi
25=r^2
sqrt both sides
5=r
radius=5cm
