75,000,000,000 in scientific notation.

10 pointsthe roof of a house has a slope of 5/12. what is the width of the house if the height of the roof is 8 feet?

Estimate the product. round the first factor to the nearest whole number, round the second factor to the nearest ten, and then multiply. 3 8/9 × 96

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.