The diameter of the Moon is 3.5 × 10^3 km. The diameter of the Sun is 1.4×10^6 km.

Calculate the ratio of the diameter of the Moon to the diameter of the Sun.
Give your answer in the form 1 : n

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Select the number of ways in which a line and a circle can intersect

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?