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Decreased risk of injury, increased bone density and strength and reduced osteoporosis
B. Cooperative federalism has been practiced in the US since 1860.
Cooperative federalism, or the concept of federalism in which local, state, and federal governments work together to create policies, replaced dual federalism in the 1930s.
Answer:
1852200
Explanation:
The number of ways in which all the works are sold = Number of ways of the selling of 4 Dalis × Number of ways of the selling of 5 van Goghs × Number of ways of the selling of 6 Picassos.
Also, number of ways in which n things can be distributed into k things are = 
k = 5
Thus,
Number of ways =
=
= 1852200
$50 times 4 million barrels/day is $200 million/day which is $73 billion/year.