Tomas has a garden with a length of 2.45 meters and a width of 5 8ths of a meter use bench marks to estimate the area and perimiter of the garden

So now what you want to do is turn 5/8 into a decimal and we do this by dividing the numerator by the denominator( In this case 5÷8=0.625)
Now we multiply L×W(2.45×0.625=1.53125) This is the area if i am correct

Now another at to do it is doing this you do 2.45×5=12.25÷8=1.53125 which is the same answer.

Now for perimeter we do this L+W×2 so we do 2.45+0.625=3.075×2= 6.15 so this is your answer.

Now you said to estimate this and if you have to round your answer you do it by depending on what place value you round to you look at the one before and if the number in the digit is greater than 5 you add 1 to the value you round to but if it is less than 4 you don't do anything and just cover over everything else

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.