4) with question. will mark brainliest + 10 points!

These question are hard can you me with answers

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

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?