Suzanne needs material for her school project. she buys 5.50 yards of material at $3.87 a yard. what is the total cost of the material? round to the nearest cent.

The whole number is 21.285, if they mean rounding to the nearest whole number it would be 21.3.
I hope this will help you, I'm a little confused when they say the nearest cent sorry.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.