In 2010, the rate of change of the world's population was approximately 0.07831 billion per year. The world population was estimated to be 6.9 billion in 2010. Answer parts a through c below. a. Write an equation to model the population P (in billions), in terms of t, where t is the number of years since 2010 (t=0 corresponds to 2010).
P=enter your response here (Remember to write the equation in terms of t.)

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

What is the missing statement in step 4? ? rts ? ? vtu and ? rtu ? ? vts ? rts ? ? rvs and ? rtu ? ? stv ? vrs ? ? vru and ? usr ? ? usv ? vur ? ? vus and ? uvs ? ? sru