How would 39,9000,000,000,000km be written in scientific notation

A student had gotten 66.5 over 70 what did that student get?

A company is researching mining at four different land areas using different types of equipment. The table below shows the costs of land, equipment, mining, and reclamation for the four locations: Locations Cost of land Cost of equipment Cost of

Write this expression in simplified form. -5x^6*9x^5

Best estimate for the product of 289 and 7?

Convert 17cm/min to m/h

Find the accumulated value of an investment of $13,180 for 6 years at an annual interest rate of 2.3% if the money is: a) compounded semiannually b) compounded monthly c) compounded quarterly d) compounded continuously

If a car travels 640 miles in 11 hours, what is the average rate (speed) of the car? A) 0.017 mph B) 17.12 mph C) 58.18 mph D) 62.9 mph

On a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and curves up and increases in quadrant 1. What are the domain and range of the function on the graph? The domain includes all integers, and the range is y ≥ 0.

How does a rectangle turn into a trapizode

This season, the probability that the Yankees will win a game is 0.59 and the probability that the Yankees will score 5 or more runs in a game is 0.45. The probability that the Yankees lose and score fewer than 5 runs is 0.33.