At t = 0 a solution containing 2 lb of salt/gal starts to flow into a tank containing 60 gal of pure water; the inflow and outflow rates of salt water are a constant 3 gal/min. How long does it take for there to be 60 lb of salt in the tank?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

What is the measure of angle 1? a.28 b.152 c.168 d.64