Alex and Ben share £520 in the ratio 1:3
b)what percentage of the £520 does Ben receive

Ben receives 75%

Step-by-step explanation:

sum the parts of the ratio, 1 + 3 = 4 parts

Ben receives 3 parts of the 4 , that is

× 100%

= 0.75 × 100%

= 75%

Share of Alex = £130

Share of Ben = £390

Percentage Ben received

Step-by-step explanation:

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: