The area of a trapezoid is given by the formula A=h/2 (a+b) where h is the height of the trapezoid and a and b are the lengths of the two parallel sides. Solve the formula for a.

Describe all the numbers that when rounded to the nearest thousand are 645,000

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The cost for an uberi is $2.50 plus $2.00 mile. if the total for the uber ride was $32.50, how many miles did the customer travel?