Respuesta :
Answer:
-(2/5)^3 or -8/125 or -0.064
Step-by-step explanation:
convert the decimal into a fraction
then use your calculator to find the exact answer
Answer:
simplify 2/5
equation at the end of step 1:
(0-2/5)^3
step 2:
2.1
Negative number raised to an odd power is negative
To show this we begin with (-7)5 ,a negative number raised to an odd exponent:
(-7)5 can be written as (-7)•(-7)•(-7)•(-7)•(-7)
Now, using the rule that says minus times minus is plus, (-7)5 can be written as (49)•(49)•(-7) which is a negative number.
We showed that (-7)5 is a negative number
Using the same arguments as above, replacing (-7) by any negative number, and replacing the exponent 5 by any odd exponent, we proved which had to be proved
final result:-2^3/5^3=-0.06400
