Round a decimal two hundred fourteen and five hundred fifty seven thousandths to the nearest tenth

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?

Is the figure congruent? yes or no?

Which expression is equivalent to 5a/4 - b/8 ?