Which ordered pair could be removed from the graph to create a set of ordered pairs that represents a function?
5
4
3+
2+
O 44,2)
0 (-1,4)
O (1,3)
O (2-3)
1 + .
++→
1 2 3 4 5 X
-5 -4 -3 -2 -11
-2
-3+
-4
-5

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

What expression is equivalent to log3(x+4)

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g