Find the product
(2n + 2)(2n - 2)
4.2 + 40 - 4
4n2-4
42-4n-4
4.2 + 2n - 4

Can someone pls ! pls answer all. no explanation needed..

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212