Steve washed 15 cars in 3 hours. how many cars can he wash in 7 hours?

What is the prime factorization of 23 ?me with this question

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )