75000 live bacteria present in a culture in a flask. when antibiotic is added to the culture, the number of live bacteria is reduced by half every four hours. approximately how many hours have passed when there are 1500 bacteria left alive?

a. 22.3 hours
b. 22.6 hours
c. 22.9 hours
d. 22.2 hours

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Solve the inequality and graph 6j - 7 < 5

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem