The answer I believe is 10 calories per minute because 20 x30 =600 I did that because she burned 20 calories per minute so with that being said there’s 60 minutes is the maximum minutes any time can go to so you do 600 divided by 60 which equals 10 which means she burns 10 calories per minute hope this is right
Answer:
「0.8 0 -2
0 1.2 3
0 0 1 」
Step-by-step explanation:

Converting from rectangular coordinates to polar coordinates involves setting

. Since the left hand side matches

perfectly, the equation's rectangular coordinate form is

.
The answer is -2x^2-16x+8