Anna is observing slides of unlabeled organisms. the organisms are unicellular, have delicate glass-like cell walls with sculpturing, and show all the cell organelles, including chloroplasts. which organism is she observing? a. euglenophytes b. dinoflagellates c. diatoms

then that particular organisms become extinct.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

digestion

it excretes wastes