I think you have to add all the numbers if im not mistaking.....hope this helped
So this is a BIDMAS question so first you do the division and multiplication so you do (15 x 18) + (12/3) + 9 and get 270 + 4 + 9 which you just add to get 283. Hope this helps :)
Answer:
43.2 × 10^-6
Step-by-step explanation:
(6 x 10^-8)(7.2 x 10^4)
43.2 × 10^-6
= 18 *

+

brackets first
= 18 * 16 + 36 next exponents
= 288 + 36 then multiplication
= 324 finally addition
Lisa was right, she used BEDMAS properly while Rob treated the

as (

-

). This made it 18 * 16 + (81 - 9) = 288 + 72 = 360.
The answer is how about no. i want free points :p