Answer:
169
Step-by-step explanation:
You need to use a Z-table for this.
There are different tables, in this table i searched for the probability of 97% because that equivalent to the top 3%.
for 0.97, Z = 1.88
The formula of Z is:

Solving x:

A pure substance that is made of only one kind of atom is called an element.
An element is a pure substance, which means it is made up of only ONE kind of atom.
Answer:
6,000= y
2hrs= x
y=x
6,000y= 2=x
Step-by-step explanation: