Answer:
7
Step-by-step explanation:
280=40t/40
t=7
Substitute the values in the expression
b-a=3-2=1
answer b-a=1
Answer:
X=27
Step-by-step explanation:

so x=27
HELLOOOOOOOOOOOOOOOOOOOOOOOOOOOOO :D
Well, if 0.4% was defected, then 99.6% of the parts are good, because 100-0.4 is 99.6. Multiply 99.6% with 54650, and you get 54431.4. You should round down, because you can't have parts of parts. So, 54431 parts were good.