Can someone help me with these questions please?

Complete the table shown to the right for the population growth model for a certain country. 2005 Population {millions} Projected 2041 Population [millions] Projected Growth Rate, k 55.4 41.3 FD (Round to four decimal places as needed.) The half-life of the radioactive element unobtanium-53 is 5 seconds. If 43 grams ofunobtanium53 are initially present, how many grams are present after 5 seconds? 10 seconds? '15 seconds? 20 seconds? 25 seconds? The amount left alter 5 seconds is D grams. The amount left alter 10 seconds is The amount left alter 15 seconds is The amount left alter 20 seconds is The amount left alter 25 seconds is (Round to one decimal place.) 3. Prehistoric cave paintings were discovered in a cave in France. The paint contained 28% of the original carbon-14. Use the exponential decay model for carbon-14, A = Ape".", to estimate the age of the paintings. . . . The paintings are approximately | years old. (Round to the nearest integer.) 4. Complete the table shown to the right for the half-life of Half-Life Decay Rate, k a certain radioactive substance. 16.8 days K = (Round to six decimal places as needed.)