( 4 / 5 )^-2 = ( 5 / 4 )^2 = 25 / 16 ;
The answer is $6.43. Hope this helps
Hello!
To solve this, find the cost of a single light bulb first, by dividing 9 / 5.
9 / 5 ==> 1.80
One light bulb is $1.80
Now, multiply 1.80 by 7.
1.80 * 7 = 12.6
7 light bulbs cost $12.6
Hope this helps! ☺♥
In the hundreds spot is a 2 and 2 is under 5 so we round down which would be 4 398 200
