This could be rephrased as:
You start with 100 grams of a substance. One year later you have 70 grams. What is the half-life?
We need this formula:
half-life = (time * natural log (2)) / natural log (beginning amount / ending amt)
half-life = (1 year * .69315) / natural log (100 / 70)
half-life = (.69315) / 0.35667494396
half-life = 1.9433661145 years
Rounding to nearest year half-life = 2 years
Sourse: https://www.1728.org/halflif2.htm
(See problem 3)
Hope this helps if it don’t sorry
well, since we know the <u>point L is on the circle</u>, that means that the segment RL is really the length of the radius of that circle, hmmm let's see what that might be
since RL is its radius, <u>anything larger than that is outside the circle, and anything smaller than that is inside it</u>. Let's check for the distance RQ.
needless to say RQ is larger than RL.
Answer:
w = - 16.06 or w = 2.06
Step-by-step explanation:
Given
w² + 14w - 33 = 0 ( add 33 to both sides )
w² + 14w = 33
To complete the square
add ( half the coefficient of the w- term )² to both sides
w² + 2(7)w + 49 = 33 + 49, that is
(w + 7)² = 82 ( take the square root of both sides )
w + 7 = ± ( subtract 7 from both sides )
w = - 7 ± , that is
w = - 7 - ≈ - 16.06 or w = - 7 + ≈ 2.06
Answer:
Minus 4
Step-by-step explanation:
17 minus 4 is 13 minus 4 is 9 minus 4 is 5