Why can it to line up the decimal points before comparing and ordering numbers with decimals

This is because the value of a number in decimal form depends on their position from the decimal point. Every number that is left of decimal point it will be valued 10 times. If you don't line them up then you cannot compare them because they could have a different value and you will end up messing the calculations.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

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