the difference between learner's permit and driver's license is;
people (with learner's permit) at age of at least 15 (and passed vision and the writing test) can be able to drive only in daylight hours. that means you can't drive at 10pm or later. with a learner's permit, you must always drive with a person who is at least 21 years old, has a driver's license, and must sit in the front passenger seat.
you might want to search on the internet what driver's license does. honestly i have no idea.
but anyway. hope this helps in anyway! ❤ from peachimin
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
I would think its A. the rest of the options are for people that can stand still and focus.
