The measurement 5.22 cm has three significant figures which means that

Significant figures measures the degree of accuracy of an answer. The more significant figures, the more accurate the answer For example, 5.2200 is much more accurate than 5.22 (Since 5.2200 5 sig figs) 5.22 having 3 significant figures means that it is accurate to the 2nd decimal place.

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!