Jackie plans to place a rectangular piece of art inside a rectangular frame. She considers a piece of art that is 0.5 meters long, 1.2 meters wide, and has a diagonal length of 1.3 meters.

Which is true regarding the art piece?
The art is rectangular because (0.5) squared + (1.2) squared = (1.3) squared.
The art is rectangular because (1.2) squared minus (0.5) squared less-than (1.3) squared.
The art is not rectangular because (0.5) squared + (1.2) squared not-equals (1.3) squared.
The art is not rectangular because (0.5) squared + (1.2) squared greater-than (1.3) squared.

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step-by-step explanation:

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a is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d