Please answer this correctly

V = 615.44 mm^3

Step-by-step explanation:

The volume of a cylinder is given by

V = pi r^2h

The diameter is 14 so the radius is 14/2 = 7

V = 3.14 ( 7)^2 4

V = 615.44 mm^3

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step-by-step explanatio89

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -