If todd spent 4.5 hours studying last week, how many minutes did he spend studying? A.540 mins
B. 270 mins
C.240 mine
D.64.5 mins

B

270 minutes= 4.5 hours

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.