Which statements about the parallelogram a’b’c’d’are true?

Bubble in the last two.

Step-by-step explanation:

When two lines are parallel it means that they are lines that will never touch, such as line AD and line BC or line AB and DC

First we calculate the half-life
half-life = elapsed time * log(2) / log (beginning amt / ending amt)
half-life = 1.5 * 0.3010299957 / log( 1.0061374384 )
half-life = 1.5 * 0.3010299957 / 0.0026573094
half-life = 169.93 years

Now we have to calculate elapsed time for 100 grams to become 1
elapsed time = half-life * log (bgng amt / end amt) / log (2)
elapsed time = 169.93 * log (100/1) / log(2)
elapsed time = 169.93 * 2 / 0.3010299957
elapsed time = 1,129 years

Source:
http://www.1728.org/halflife.htm