Answer:
8
Step-by-step explanation:
PEDMAS
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
There is no single solution but there is a group of solutions also known as the interval.
This can be written with an interval.
Hope this helps.
r3t40
-2(b-1)=2(1+7b)
First, distribute; -2b+2=2+14b
Get the variables on one side; -2b+2=2+14b
-14b -14b
Get the constants on one side; -16b+2=2
-2 -2
Divide to find “b”; -16b/-16=0/-16
b=0
By definition we have to:
v = d / t
Where,
v: speed
d: distance
t: time
The time in hours is given by:
t = 4 + (45/60)
t = 4.75 hours
Substituting values we have:
v = 456 / 4.75
v = 96 km / h
Answer:
the speed of the train is:
v = 96 km / h
