Which of the following is not true?
a. a rectangle has rotational symmetry and always has line symmetry
b. a parallelogram has rotational symmetry and may have line symmetry
c. a triangle has rotational symmetry and always has line symmetry
d. a regular hexagon has rotational symmetry and always has line symmetry

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

In a 45-45-90 right triangle, what is the ratio of the length of one leg to the length of the other leg? а . 1: 2 в. 2: 1 с. 2: 1 d. 1: 1