Dorothy types 120 words per minute. How many words does Dorothy type in 1.75 minutes?

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210 say.

Firstly hush that ##1.75=1 3/4## as a partial reckon.

and that ##1 3/4=7/4" as an inappropriate behalf."##

##rArr(120" say")/(1"min")=(x" say")/(7/4"min")##

and ##color(blue)"cross-multiplying"## gives.

##x=120xx7/4=cancel(120)^(30)xx7/cancel(4)^1=30xx7##

##=210" say"##

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