In 2014, Sally used 5400 units of electricity. In 2015, the price of electricity increased by 8% but Sally reduced her usage to 4500 units.
Sally paid £680.40 for the units she used in 2015.
Did she pay more or less for the units she used in 2014? Show your working.

Please answer!!

use the power rule  

( a b ) n = a n b n

to distribute the exponent.

apply the product rule to  

3 x 2 y 3 . ( 3 x 2 ) 2 ( y 3 ) 2

apply the product rule to  

3 x 2 . 3 2 ( x 2 ) 2 ( y 3 ) 2

raise  

3

to the power of  

2 . 9 ( x 2 ) 2 ( y 3 ) 2 multiply the exponents in   ( x 2 ) 2

.

apply the power rule and multiply exponents,  

( a m ) n = a m n . 9 x 2 ⋅ 2 ( y 3 ) 2

multiply  

2   by   2 . 9 x 4 ( y 3 ) 2

multiply the exponents in  

( y 3 ) 2 .

apply the power rule and multiply exponents,  

( a m ) n = a m n . 9 x 4 y 3

⋅

2

multiply  

3   by   2 . 9 x 4 y 6

step-by-step explanation:

christopher is 272,195 year old

step-by-step explanation:

sorry i just need to anwers this to get points

step-by-step explanation:

correct answer is c. just did it

step-by-step explanation: