The grand canyon is approximately 29 kilometers long. mariner valley is a canyon on mars that is approximately 212 kilometers long. about how many times longer is mariner valley than the grand canyon?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30