HELP

Solve the formula E = /(R + r) for r.​

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Acircle has a circumference of 7.850 units. what is its radius?