101010 rubber stamps cost \$10.30$10.30dollar sign, 10, point, 30. Which equation would help determine the cost of 222 rubber stamps?
Choose 1
Choose 1

(Choice A)
A
\dfrac{2}{x} = \dfrac{\$10.30}{10}
x
2

=
10
$10.30

start fraction, 2, divided by, x, end fraction, equals, start fraction, dollar sign, 10, point, 30, divided by, 10, end fraction

(Choice B)
B
\dfrac{x}{2} = \dfrac{10}{\$10.30}
2
x

=
$10.30
10

start fraction, x, divided by, 2, end fraction, equals, start fraction, 10, divided by, dollar sign, 10, point, 30, end fraction

(Choice C)
C
\dfrac{2}{10} = \dfrac{\$10.30}{x}
10
2

=
x
$10.30

start fraction, 2, divided by, 10, end fraction, equals, start fraction, dollar sign, 10, point, 30, divided by, x, end fraction

(Choice D)
D
\dfrac{2}{\$10.30} = \dfrac{x}{10}
$10.30
2

=
10
x

start fraction, 2, divided by, dollar sign, 10, point, 30, end fraction, equals, start fraction, x, divided by, 10, end fraction

(Choice E)
E
None of the above

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

5. (04.07)which of the following exponential functions goes through the points (1, 12) and (2, 36)? (2 points)f(x) = 3(4)^xf(x) = 4(3)^-xf(x) = 3(4)^-xf(x) = 4(3)^x

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?