Answer:
200π
Step-by-step explanation:
Surface area of a cone = πr(r+l)
r is the radius
l is the slant height
Volume of the cone = 1/3πr²h
320π = 1/3πr²h
320 = 1/3r²(15)
320 = 5r²
r² = 320/5
r² = 64
r = 8
l² = 15² + 8²
l² = 225 + 64
l² = 289
l = 17
Get the surface area;
S = πr(r+l)
S = π8(8+17)
S = π*8*25
S = 200π
Hence the surface area of the cone is 200π
Answer:
2(x + 3) <9
Step-by-step explanation:
<u>Two times</u> the <em>quantity of a number increased by 3</em> is <u>less than 9</u>
2 · (x + 3 ) < 9
= 2(x + 3) <9
Answer:
It's y=2x+6
Step-by-step explanation:
Y=mx+b
(1,9) and slope= 5 9=5(1)+b
9=5+b 9-5=b
4=b Equation is
Y=5x+4
