The mass of 4.5 cm3 of iron and 8 cm3 of copper is equal to 101.5g. the mass of 3 cm3 of iron is 6.8g greater than the mass of 2 cm3 of copper. find the density of iron and the density of copper.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?