Question

You find a fossilized dinosaur egg. It is spherical with a diameter of 17 cm. What is the volume of the egg?

Answer 1

volume of a sphere: (4/3)pi (r^3)
radius = 1/2 diameter
so when diameter = 17
then radius = 8.5
so solve --> (4/3) pi ( (8.5)^3 ) =

Answer 2

so is it 2572.44 ?

Answer 3

that's what I got :)

Answer 4

Awesome! what about this one?

You find a fossilized animal footprint in Montana. The footprint is round and has a diameter of 42 cm. What is the area of the footprint?

Answer 5

diameter means that the over all shape is a circle
area of circle = pi r^2
radius = 1/2 diameter
so when diameter = 42
then radius = 21
so solve --> pi (21)^2 =

Answer 6

1385.44?

Answer 7

that's what I got :)

Answer 8

A paleontologist finds a fossilized reptile scale. It is triangular in shape with a base of 1.5 cm and a height of 2.2 cm. What is the area of the scale?

Answer 9

area of triangle = (1/2)(base)(height)
so with what you're given --> (1/2)(1.5)(2.2) =

Answer 10

1.65?

Answer 11

yep :)

Answer 12

A fossilized animal footprint has three rectangular toes. Toe A has a length of 9 cm and a width of 6.5 cm. Toe B has a length of 8.7 cm and a width of 6 cm. Toe C has a length of 9.4 cm and a width of 7.2 cm. What is the surface area of the bottom of each toe?

Answer 13

I have no idea where they get these scenarios..

Answer 14

area of rectangle = (length)(width)
Toe A = (9)(6.5) =
Toe B = (8.7)(6) =
Toe C = (9.4)(7.2) =

Answer 15

a = 58.5
b = 52.2
c = 67.68


The teeth of a newly discovered ancient animal are shaped like cylinders. A paleontologist finds that Tooth A is 6 cm long with a radius of 3 cm. Tooth B is 5.5 cm long with a radius of 3.5 cm. Which tooth has a larger surface area?

Answer 16

correct :)
and now...
surface area of cylinder = 2 pi r^2 + 2h pi r
so Tooth A = 2 pi (3^2) + 2(6)pi(3) =
Tooth B = 2pi(3.5^2) + 2(5.5)pi(3.5) =
then compare the two...

Answer 17

a = 169.65
b = 197.92

?

Answer 18

so B is greater than A
therefore B would be the answer they want :)