Which matrix below represents 3 X 3 Identity Matrix (I3).
a.
1 0 1
0 1 0
101
Tool
010
100
100]
b.
1
1
1
d. To lo
0 0 1
11
ТОА
OB

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

What is the value of x? enter your answer in the box. (cm)

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is