math help please?

Question

11: Find the volume of a cylinder with radius 3.5" and altitude 7.5". Use pi = 3.14.
248 cu. in
320 cu. in
288.5 cu. in
304.5 cu. in


12: What is the surface area of a rectangular prism with these dimensions: 2" x 10" x 16"
424 sq in
3840 in
320 sq in
26 2/3 in


13: Name the solid for which the equation: T = 2lw + 2lh + 2wh, can be used.
Sphere
Rectangular Prism
Cone
Cylinder

Answer 1

11
A. of cylinder= A. of base(cirlce)x hight
=3.14x(3.50)^2x7.5
=288.48 App.(288.5 cu.in)

12
2(l x w)+ 2(w x h) +2(h x l)

13
rectangular prism

Answer 2

11) Volume of a cylinder is (pi)(radius^2)(altitude)

12) Surface area of a rectangular prism is
2(length x width) + 2(length x height) + 2(width x height)

13)
Check out #12 and you should be able to figure it out.

Answer 3

11. vol. cylinder=2 pi X radius X eight
= 6.28 X 3.5 X 7.5
= 164.85
answer is none of the above

Answer 4

Volume of a cylinder formula

v = π r² h

v = 3.141592654(3.5)²(7.5)

v = 3.141592654(12.25)(7.5)

v = 38.48451001(7.5)

v = 288.633825

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