Answer:
uhh 70
Step-by-step explanation:
Answer 12.4
Step-by-step explanation:
33.48/2.7=12.4
Answer:
Step-by-step explanation:
We can draw a perpendicular line through the two parallel lines to create a pentagon (there is an image attached in case you need to see where the line intersects the two parallel lines). Since the angle sum of a pentagon is 
, we can solve for 
.
(Angle sum of pentagon is )
(collect like-terms)
Hope this helps :)
Answer:
y=9
Step-by-step explanation:
9y=81
divide 9 on both sides
y=9
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)
