Answer:
is scientific notation of 78 billion
Step-by-step explanation:
For scientific notation , follow the following notation:
-------->(equation 1)
Let,
In standard form

or

As decimal point move 10 places from right to left, therefore
b = 10
Put the value of 'a' and 'b' in (equation 1)
is scientific notation of 78 billion
Y=68+4x
100=68+4x
-68=-68
32=4x
Divide both sides by 4
x=it will take 8 min. for the water to reach 100 degrees
y=total degrees
x=# of minutes
Hey! The answer is in the attachment.
Source : Done from 'My Paint'
I think it's the Multiplication Property of Equality.
Hope this helps you! :)
Answer:
5/49
Step-by-step explanation:
3/7 x 5/21=15/147=5/49