Compare these two numbers which one has a greater value
8.5 x 10^23 or
9.99 x 10^21

For an experiment, a penny is tossed. at the same time, a spinner with 8 congruent sections numbered 1–8 is spun. how many possible outcomes are there for the experiment?

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?