4. Triangle PQR has vertices P(2,4), Q(8,8) and R(8,4). On the grid provided, graph the dilation of
Triangle PQR using a scale factor of – and the
4
origin as the center of dilation.
What are the coordinates of Triangle P'Q'R'?
A P’(-0.5, -1) Q’(2, 2) R’(2,1)
B P’(0.5, 1) Q’(2, 2) R’(2,1)
C P’(0.5, 1) Q’(-2, 2) R'(-2,1)
D P’(0.5, -1) Q’(2, -2) R’(2, 1)

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.