18. Assessment Focus You will need
1-cm grid paper and coloured pencils.
a) Draw a 6-cm by 8-cm rectangle.
Shade:
T the grid solares in the
rectangle red
0.25 of the grid squares green
of the grid squares blue
Explain how you did this.
b) What fraction of the rectangle is
a squiares blue
Explan
not shaded? Write this fraction as a
decimal and as a percent
c) Do you think you could have
completed part a with a 6-cm by
9-cm rectangle? With a square of side
length 7 cm? Explain.

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning