How could you estimate a 20% tip for a $23.25 restaurant bill

I would round 23.25 up to 24, then double that to get 48, and finally move the decimal point 1 spot to the left to get 4.80

Note how 20% of 24 = 20/100*24 = 0.2*24 = 4.80

This is an overestimate of the actual tip which is...

20% of 23.25 = 0.2*23.25 = 4.65

The overestimate occurs because I rounded 23.25 up to 24. I rounded up because it is easier to deal with whole numbers. Also, you should round up (not down) to make sure you clear over the target hurdle.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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rauschg

rauschg · hand

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$450 i think. hope this ☺