If there are 48 grams of Np-240 present, how much Np-240 will remain after 4 hours? (Np-240 has a half-life of 1 hour) Answer:

Thank you! This might be a stupid question... but how do you algebraically solve the part where you divide A sub n+1 by a sub n?  How did you get 1+(3^n)+3 in the numerator? I thought the answer would be 2n(1+3^n+1)? Please explain that. I didn't understand that during class either.

300 2 Two years ago the Delhi metro track's length was 200km tong al What is 10ON of the length? b) The new track length increased by 20% What is the new track length? So 150 7 70 200 25 O% 20% 40% 6ON 80% 100% 12u 3. On her first day of playing an online math game, Zina earned 24 stars. That's 25% of the goal the next level. How many points are needed to teach the next level? 36 24 100 0% 25% 4. On Sadle's first day of playing a different online math game, the earned 24 stars. That's 30s of the goar to reach the next level, How many paints are needed to reach the naxt level in Sadie's game ? 30% 2017, Lesson Alluton Opan p Roaouas. Content pded by Open Up ant paita Modified from CUR Teacher Materials, .cenhaadu

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