Someone help me with this ASAP!!

7.5 minutes

Step-by-step explanation:

The problem says that each camera has 1 hour of digital space. Because you calculated that the total time of speeches will be 52.5 minutes, you can do as follows:

1 hour = 60 minutes

60 - 52.5 = 7.5

I hope this helped! You are going to do well in life! Never be afraid to ask your teacher or a fellow student for help!

900 degrees

step-by-step explanation:

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column