I dont understand this please explain step by step

3. solve the given inequality and graph the solution on a number line.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?