1 lawnmower= 8hours/12 =2/3 hour
30 lawnmowers= 30*2/3hour= 20 hours
There will be a 25 grams left after 3240 years.
The half-life of Radium-226 is 1620 years. If we divide 3240 by 1620 the answer is 2. So that means the amount of Radium-226 will divide in half twice.
100 / 2 = 50 / 2 = 25
Y=-6 would be one equation
Answer:
9 boxes
Step-by-step explanation:
Since 1 ft= 12 inches then with diameter of 12 ft, radius becomes 6 ft and converted to inches it's 6*12=72 in
Area of 1 tile= 9*9=81
Number of tiles=
Number of boxes= 202/25=8.08 boxes hence 9 boxes