During first half of the journey a body travels with speed of 40km/hrs and in next half it travels with speed of 20km/hrs. calculate the average speed of the whole journey

Aprovision of the general agreement on tariffs and trade treaty (gatt)increased taxes on services between the us, mexico, and canada.reduced international tariffs on industrial goods by forty percent.increased us tariffs on agricultural products by forty percent.ended taxes on goods traded by the us, mexico, and canada.

Which of the following was discovered in the piedmont region of north carolina in 1799?

Can someone me answer all the questions?