Martin and his family ate in a restaurant. the cost of the food was $84. including the tip, martin paid $100.80. how much was the tip?

$16.80

Step-by-step explanation:

This is a simple subtraction problem!

Steps:

1. 100.80-84= 16.80

--subtract how much the bill was from how much he paid to find out how much he tipped.

The tip was $16.80!

Hope this helped :)

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²

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

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