7. The graphs of and are given.
a) For what values of is ?
b) Find the values of and .
8. A spherical balloon with radius inches has volume
.
Find a function that represents the amount of air required to inflate the balloon from a radius of
inches to a radius of inches.
9. It makes sense that the larger the area of a region, the larger the number of species that inhabit the
region. Many ecologists have modeled the species-area relation with a power function and, in
particular, the number of species S of bats living in caves in central Mexico has been related to the
surface area A measured in of the caves by the equation
(a) The cave called mission impossible near puebla, mexico, has suface area of .
How many species of bats would expect to find in that cave?
(b) If you discover that species of bats live in cave estimate the area of the cave.
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