How would i write 9,540,000 in expanded form using exponents to show the power of 10? ?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?