Cathy ran for 30 minutes at a rate of 5.5 mi/h. then she ran for 15 minutes at a rate of 6mi/h. how many miles did she run in all ?

Points d and e are midpoints of the sides of triangle abc. the perimeter of the triangle is 48 units. what is the value of t? ο ο ο ο 7t +

Asap will give brainliest and a lot of points

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?