15. the operation * is defined on the set r
a
+b
– 1 for
of real numbers by a*b =
all a, ber.
(a) is r closed under* ?
(b) is the operation * commutative
in r?
(c) is the operation * associative in
r?

Normal yağmur ile asit yağmuru arasındaki fark nedir

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. david estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x.

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?