Subtraction doesn't mix with mult. or div. Are you sure you've copied this problem down correctly?
"decrease an amount (x) by 19" would be x - 19 (NO multiplication here)
150g/12cakes
150/12 = 12.5
12.5g/cake
12.5x30 = 375
Therefore, you need 375g for 30 cakes.
Answer:
<u>U = mgh = (1250 kg)(9.8 m/s2)(2m) = ? J</u>
HOPE THIS HELPS
I can help with the formula just do the math on a calculator you multiply length x width x height
