89.
inches
First, convert 2843in to feet. This is done by taking 2843/12=236.917 ft. Then, to go from feet to miles, the conversion is 5280ft/mile, so take 236.917/5280 to obtain .044871 miles. MILES would be the numerator
16
If the numerator is 0 AND the denominator is not 0, then the ratio is 0. And cosine of 0 is 1.
The ratio would be 3.0 to 1 or, as a fraction, 30/10 (in order to retain the precision to the tenths place...it is bad form to place a decimal in the numerator or denominator on a fraction).
inches
Inches
inches go in the numerator
In converting 54 cm to inches, you would place the unit "inches" in the numerator of the ratio. Since there are 2.54 cm in 1 inch, the ratio would be written as 1 inch/2.54 cm.
2843in x 1ft/12in x 1mi/5280ft = 0.04487mi
inches
inches
You would place "centimeters" in numerator and "centimeters per inch" in the denominator. (centimeters)/(centimeters/inch) = [(centimeters) x (inch)] / [centimeters] which yields "inch(es)"
Oh, dude, in converting 0.55 feet to inches, you'd put 1 foot in the denominator of your ratio because there are 12 inches in a foot. So, you'd have 0.55 feet multiplied by 12 inches/1 foot, which equals 6.6 inches. Easy peasy, right?
You want the units to cancel. Think of what you already have as a value /1. So if you have 90 inches, you would write it as: 90 inches/1 * 2.54 cm/1 inch This makes the inch on the left cancel with the inch on the right, leaving you with cm as the units for your answer.
First, convert 2843in to feet. This is done by taking 2843/12=236.917 ft. Then, to go from feet to miles, the conversion is 5280ft/mile, so take 236.917/5280 to obtain .044871 miles. MILES would be the numerator
1/36