Preferably type out the answer (sometimes it's hard to understand a handwriting). ONLY NEED ANSWERS, NO EXPLANATION REQUIRED

1.

Find the value of b, if any, that would cause the graph of y = log, x to look like the graph below. -7 - 6 -5 -4 -3 -2 -1 2 6 b = PreviewA tumor is injected with 2.5 grams of Iodine, which has a decay rate of 1.65 % per day. Write an exponential model representing the amount of Iodine remaining in the tumor after t days. Find the amount of Iodine that would remain in the tumor after 60 days. Round to the nearest tenth of a gram. dddddd = Remaining after 60 days: grams A research student is working with a culture of bacteria that doubles in size every ten minutes. The initial population count was 6 bacteria. Write an exponential equation representing this situation. Use t to represent hours. If you use the exponential function Poe\As an isotope of lead, 20 Pb, has a halflife of 8.4 hours. How many hours ago was there 30 % more of the substance? Round your answer to 2 decimal places.Only 40 % of the carbon-l4 in a wooden bowl remains. How old is the bowl (rounded to the nearest hundred years, and use 5700 years as carbon-14's half life)? In 3 years, 15 % of a radioactive element decays. Find its half-life rounded to 2 decimal places. years