Answer:
it is the first one because you would be deciding by 2
Think about what a half-life means as a table.
years amount Left
20 1/2
40 1/4
60 1/8
80 1/16
Starting at t = 0, the amount left (or density) = (1/2)^(t/20)
For t =35, the decay factor = .297
Since you need to work backwards, divide by that factor. 6 / .297 = 20.18 mg per sq cm
Triangles equal 180. The bottom left corner is 90 in this triangle. Add the angles together set equal to 180.
x = unknown angle
90 + 67 + x= 180
157 + x= 180
subtract 157 from both sides
x= 23
ANSWER: x=23
Hope this helps! :)
Answer: the velocity and position vector is given by;
v(t) = 3i + 2j + (1-32t)k
r(t) = (3t)i + (5-2t)j + (2+t-16t^2)k
The position at time t=2; r(2)
r(2) = 6i + j - 60k
Step-by-step explanation:
Shown in the attachment.