Work out (5X10^3) x (9X10^7) answer in standard form plz

4.5x10^11

Step-by-step explanation:

= (5x10^3) x (9x10^7)

= 4.5x10^11

4.5×10¹¹

i) use the commutative property to rearrange the terms: a+b = b+a

ii) multiply the number in the 1st bracket

iii) multiply the 2nd bracket by adding their exponents

iv) write the answer in standard form

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

step-by-step explanation: