A cone has a height of 7 ft and a radius of 4ft Which equation can find the volume of the cone?
O V-3867249982
OV-3 (4217) 11
O V = 37(72)(4) f
O V = 37(42)(7)ft

answer: 0.26

i used the calculator on google

jbankston is right, use thhe link and you should find the answer.

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81