We can’t answer this question without more info. It’s clearly a multiple choice question, so you need to provide the answers.
Answer:
Step-by-step explanation:
Original 873 New 781
The new went down by about 10.5%
873*10.5%= 91.67
873-91.67= 781.33
It decreased 10.5%
The formula for a cone is

insert 20 for your height and rearrange the formula to find the radius. Leave a comment if you need more help.
You get 5/10, or simplified as 1/2.
The slope formula is rise over run, or Y(1)-Y(2)/X(1)-X(2), which becomes 5-0/14-4. That then simplifies to 5/10, or 1/2
Answer:
(-9) still means -9 it doesn't really mean anything thou....but if u have another number besides it then it means to multiply like maybe 2(-9)then it will be -18...... but if it is just (-9) then it doesn't mean anything.....