The density of an object is y^10grams/cm^3. its volume is y^4cm^3. what is the objects mass?

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Si el duplo del mayor de dos numeros se divide entre el el triplo del menor, el cocient es 1 y el residuo 3, y si 8 veces el menor se divide por el mayor, el cociente es 5 y el residuo 1

In 2014, the three largest economies in the world were (listed in order, from largest): a) the u.s., china, germany. b) the u.s., china, japan. c) china, the u.s., japan. d) china, the u.s., germany.