#1 If y varies inversely as x, and y = 8b when x = 10a, what is y in terms of a and b when x = 4?
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#2 Use the following situation to answer the question.
The number of letters (n) which can be typed on a sheet of paper varies inversely as the square of the size (s) of the letters used.
What is the relationship connecting n and s?
b. s = kn2
c. n = ks2
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#3 Use the following situation to answer the question.
The time (t) in minutes, for a stadium to empty varies directly as the number of spectators (s) and inversely as the number of open exits (e).
How long does it take the stadium to empty when there are 36,000 spectators and 24 open exits? (The k value is .012)
a. 15 minutes
b. 18 minutes
c. 36 minutes
d. 80 minutes
#4 Use the following situation to answer the question.
You travel at an average speed of 5mph to travel 100 miles and it takes 20 hours.
What type of variation is described?