Unstable traffic flow occurs when drivers accelerate and brake too often. Unstable traffic flow wastes energy. The table below gives one example of traffic speeds, in
lometers per hour
), man
o
Time (p. m.)
Speed (km/h)
4.00
30
4.10
20
4:20
50
4:30
70
4:40
20
4:50
7 0
5:00
20
What is the mean speed, in km/h, in this situation?
You may use the calculator
A 20
B 30
C 40
D 50

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Explain why scientists use shared characteristics to make cladograms.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.