6. Calculate the percent of original nuclear waste remaining on the table below, as well as the time needed for decay based on the half-life of strontium-90 (29 years). x 29 Test Tube Percent of Original Time Needed For Decay Nuclear Waste Remaining (years) 1 100% n/a 50% 29 baroloo h 2 50/0 4 12.5 % thereM UI 6.25 to a 3. 12.5 010 1.5625 540 8 0. 781250 7. Graph the decay of your sample of Strontium-90. The number of years passed will be the independent variable, while the percent of strontium-90 remaining will be the dependent sout variable. bill of tibbs bas ad bb bbA udul test tank kai of id s 8. Assume that strontium-90 is considered safe once its levels drop below 1% in a sample. Draw a horizontal line on your graph to show where the 1% mark would be. 2