Today you will
Solve equations with expressions containing
rational exponents
Solve each equation:
x
3
5 =5
x
5 = 125
x
2 = 32
x
4 = 256
25
x-1
2x - 1
16
2x + 3
12
=5
=8
= 144
The sun protection factor (SPF) of a sunscreen indicates
how well it protects you.
Sunscreen with an SPF of f absorbs about p percent of the
UV-B rays, where
p = 50f
0.2
Find the SPF that absorbs 100% of UV-B rays.
The radius r of the nucleus of an atom of mass number A is
1
3
r = 1.2A
Find A if r = 3.6 femtometers.
femtometers