Colin the Conservationist has been investigating the IUCN Red Data list of species. Between 66 and 67 thousand species have been assessed and placed on the list.
Your task is to work out the number of species in each of 7 categories.
There are 78 species which are “extinct in the wild”.
11 times that many have gone “extinct” since 1500AD.
Respectively 6 and 9 times as many species as have gone
“extinct” are on the “critically endangered” and “endangered” lists.
24,570 species are listed as threatened, which means they are
“vulnerable”, “endangered” or “critically endangered”.
The number of “near threatened”
species is 468 more than a third of
the number which are “vulnerable”.
The good news is that there are
7,098 more species on the “least
concern” list than in all the other
categories combined.

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?

Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. a converse statement is formed by exchanging the hypothesis and conclusion of the conditional. a) a non-converse statement is not formed by exchanging the hypothesis and conclusion of the conditional. true b) a statement not formed by exchanging the hypothesis and conclusion of the conditional is a converse statement. false; an inverse statement is not formed by exchanging the hypothesis and conclusion of the conditional. c) a non-converse statement is formed by exchanging the hypothesis and conclusion of the conditional. false; an inverse statement is formed by negating both the hypothesis and conclusion of the conditional. d) a statement not formed by exchanging the hypothesis and conclusion of the conditional is not a converse statement. true