Can anyone please explain please!!

how does this formula equal 24 I'm confused?

Step-by-step explanation:

Ok I got you!  The "4!" is called the factorial of 4 and it is equal to 4 * 3 * 2 * 1 which is equal to 24.  0! (0 factorial) is always equal to 1.  Hope that helps!

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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