Which example shows the identity property of multiplication? 1. a(b + c) = ab + ac

2. (a + b) + 9 = a (9 + b)

3. a + a + a = 3a

4. a(1) = 1

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

Elizabeth is using a sample to study american alligators. she plots the lengths of their tails against their total lengths to find the relationship between the two attributes. which point is an outlier in this data set?