Question

Solve.

b^4 =1/81
b=?

Answer 1

HI!!

Answer 2

@iGreen. @Holly00d1248

Answer 3

hi

Answer 4

Take the 4th root of both sides

Answer 5

do you know a number that raised to the fourth power is \(81\)?

Answer 6

you can probably make a guess

Answer 7

no i did not.

Answer 8

\(b = \sqrt[4]{\dfrac{1}{81}}\)

Answer 9

guess one

Answer 10

i guess \(4\) but that is not right, because \(4^4=4\times 4\times 4\times 4=256\)
guess a smaller one

Answer 11

3

Answer 12

3x3x3x3=81

Answer 13

bingo\[3^4=3\times 3\times 3\times 3=9\times 9=81\]

Answer 14

of course you want that number in the denominator

Answer 15

ohh so b=3?

Answer 16

hmm no, the 3 is in the denominator

Answer 17

ohh ok

Answer 18

put a 1 in the numerator

Answer 19

?

Answer 20

\[\left(\frac{1}{3}\right)^4=\frac{1^4}{3^4}=\frac{1}{81}\]

Answer 21

ohhh. how do u write those fractions like that?

Answer 22

Use the equation button

Answer 23

what button?

Answer 24

@misty1212