B(cone)=B(pyramid)=r²π
V(pyramid)=1/3 * B * H = 1/3 * r² π * 3 r ( 3 will cancel out )= r³ π
Answer: r³ π
1. 8 to 5
2. 4 to 19
3. 6 to 23
4. 16 to 10, 24 to 15
5. he runs 5 meters in 2 seconds
6. $8.75
7. Danny offers a better deal
8. 12
Answer:
x= first number y= second
x=2y+9 and x+y=129, these are the equations...solving gives x=89,y=40
Step-by-step explanation:
the slope is -2
have a nice day :D
