The last one 7(30)-7(7) because if you do it then it is 7(23) which doesn’t make sense because it is 27 we need to find
Answer:
Equal to 440
Step-by-step explanation:
Answer:
dude. why are you asking me?
Step-by-step explanation:
yuh.
To know the initial amount of the radioactive substance, you should read the graph in the y - axis when the x = 0, because at x = 0 this means the intial point of the graph or the initial amount of the substance. so at x = 0 the y = 45 so the initial amount is 45 g
multiply by 4 for each number
5*4=20
20*4= 80
80*4=320
Answer is 320
