Answer:
N = N0 e^-x t is the general form for Half-Life decay of atoms
B would be the correct choice
The recursive formula would be:

This is because the first term, a₁, is 10. A recursive rule is dependent upon the term before it (a(n-1)) and the common ratio. The common ratio, or the number that each term is multiplied by, is -8.
Try YouTube there should be videos on how to do it .
19.00 3.50 11.00 4.47 makes it add up to hours so that will be answe C
Answer:
<h2>a = 400/21, b = 580/21</h2>
Step-by-step explanation:
Small triangles are similar. Therefore, the sides are proportional
<em>cross multiply</em>
<em>divide both sides by 21</em>

For b, we can use the Pythagorean theorem:
