Which of these situations can be modeled by a circular permutation?
the ways to arrange 10 different beads on a necklace with no clasp
the ways to arrange your little brother's toy cars all in a row
the ways to stand in a line at a grocery store
the ways to arrange people on a ferris wheel

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?