Step-by-step explanation:
density= mass / volume
= <u> </u><u> </u><u>100g</u><u> </u>
20cm^3
= 50g/cm^3
The total cost of the item at the value of $25 and a tax of 7% is $26.75
<h3>Total Cost </h3>
Given Data
We have the given expression to find the total cost which is
Total = c + 0.07c
Substituting our given data into the expression we have
Total = 25 + 0.07*25
Total = 25 + 1.75
Total = $26.75
Learn more about total cost here:
brainly.com/question/25109150
It is given in the question that initial amount of C 14 is 10 gms .
So after first half life,initial amount of C 14 becomes half , that is 5 grams .
After second half life, the amount left is the half of the amount that we got after first life, that is half of 5 gm which is 2.5 grams .
So after two half lives, the 10gm C 14 becomes 2.5 gm C 14 .