For each equation given complete the table and then use the points in your table to sketch the graph of the equation, only #1

FOR THE FIRST TABLE ON THE LEFT

XY

-2      1/4

-1       1/2

0        1

1          2

2         4

FOR THE SECOND GRAPH TO THE RIGHT IS

XY

-2              1/9

-1          1/3

0        1

1            3

2           9

Step-by-step explanation:

XY

-2              1/9

-1          1/3

0        1

1            3

2           9

Step-by-step explanation:

120 grams will be left after 180 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

where,

= quantity of the substance remaining

= initial quantity of the substance

= time elapsed

= half life of the substance

From the information given we know that:

And we want to find how much will be left. For this we use the above formula.

120 grams will be left after 180 years.