Identify problem
Gather info
Identify options
Evaluate options
Consider consequences
Choose the best option
Make a plan
Carry out plan
Evaluate how plan worked
I’m not really sure where Consider consequences goes but I’m pretty sure the rest are right. :)
Answer:
Getting an after-school job and convincing friends to get a job too.
Explanation:
The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
Read more about half life at; brainly.com/question/11152793
Answer:
C: The Assyrians became skilled warriors and invented of the battering ram.
Explanation:
The Assyrians were outstanding combatants. They had iron weapons and were amazing engineers. Assyrians had a fully equipped and professional standing army and were ruthless in battle which will later lead to their downfall. They also invented the battering ram and many military tactics that helped them expand their empire at a quicker pace.
