Answer:
Step-by-step explanation:
the answer is explained in the picture
Not sure what your asking but:
0.000675 is equivalent to 6.75x10^-4
hope this helps
Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90
Because you now have 31 you - 8 from 31
equation 31-8=e
solve 23 elephant before summer