A research assistant macle 160 mg of radioactive sodium (Na24) and found that there was only 20 mg lelt 45 h later.
1. What is the half-life of Na24?
b. Find a function that models the amount A left after i hours.
c. li the laboratory requires 100 mg of Na24 12 h from now. how much Na24
should the research assistant make now? (Ignore the 20 mg she currently
bas.)
d. How much of the original 20 mg would be left in 12 h?

answer: ur v dumb

step-by-step explanation:

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.