Give statements and reasons

A two column proof is presented as follows;

Statement                                     Reason

1. AB ║ DE, BD bisects AE            Given

2. ∠BAE = ∠AED, ∠ABD = ∠BDA Alternate ∠s are equal

3.   =   ,   =              By definition of bisection of line AE by BD

4. ΔABC ≅ ΔEDC                           By SAA, rule of congruency

Step-by-step explanation:

Step 1. AB ║ DE, BD bisects AE            Given

Step 2. ∠BAE , ∠AED, and ∠ABD, ∠BDA are pairs of alternate angles formed by the parallel lines, AB and DE and are therefore, equal

Step 3.   =   ,   =    The bisection of line gives two lines of equal length. The bisection of AE by BD gives,   and   where =  

Similarly, the bisection of BD by AE gives, and  , where   =  

Step 4. ΔABC ≅ ΔEDC    By the Side-Angle-Angle (SAA), rule of congruency, which states that two triangles having two angles and the corresponding non included sides of each triangle equal to the other, the two triangles are congruent.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)