Riley is 3 years older than his sister. the sum of their ages if s represents riley's sister's age is shown as
a. 3s
b. b s + 3
c. 2(s + 3)
d. 2s + 3

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.