can someone solve this for me

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

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?

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4