Question

solve 0.011 ^-2, the answer is not important, I just want to know now to solve these equations.

Answer 1

the first thing you have to know is what a negative exponent means.
\[b^2\] is pretty straightforward: is it
\[b^2=b\times b\] but the minus sign in the exponent means to take the reciprocal, so
\[b^{-2}=\frac{1}{b^2}\]

Answer 2

in this example
\[b=0.011\] so if you want
\[(0.011)^{-2}\] you have to compute
\[\frac{1}{(0.011)^2}\]

Answer 3

hope that helped

Answer 4

erm I could still do with some help

Answer 5

so 0.011^2= 0.000121

Answer 6

yes but you did have an exponent of -2 right? not 2

Answer 7

so it is 1/0.000121?

Answer 8

Opps.... I missed the - sign in the exponent...

Answer 9

yes.

Answer 10

it is
\[\frac{1}{.000121}\] and this you can compute by using a calculator, or by changing it to a fraction as
\[\frac{1,000,000}{121}\]

Answer 11

[1/(0.011)^2]
=[1/(11/1000)^2]

Answer 12

oh that is a fraction, I thought it meant divide

Answer 13

@hollywood they mean the same thing

Answer 14

\[\frac{5}{2}\] means "five halves" or "five divided by two"

Answer 15

a fraction bar is a synonym for division.
\[2\div 3=\frac{2}{3}\]

Answer 16

so
\[\frac{1}{0.000121}=1\div0.000121\]

Answer 17

if you wanted to compute this using a calculator you would press the
\[\div\] button

Answer 18

in the last problem i posted, the 1 became 10000000

Answer 19

ok that is because if i want to write
\[\frac{1}{.02}\] for example as a fraction, i would move the decimal place two spaces right in the numerator and denominator

Answer 20

you might think "why isn't
\[\frac{1}{.02}\] a fraction already?" that is because you have a fraction and a decimal

Answer 21

so moving over two spaces i write
\[\frac{1}{.02}=\frac{100}{2}\] now i have a fraction

Answer 22

and now i see that since
\[\frac{100}{2}=100\div 2=50\] i know what that number is

Answer 23

ok

Answer 24

thanks

Answer 25

yw

Answer 26

so you divide 121 by 1000000