Answer: True
Explanation:
The Slave and Trade Act was an Act that Congress wanted to pass to stop the importation of enslaved people from outside the country as a first step to limiting slavery. The South wanted to delay this for more than a decade.
The 3/5ths Clause allowed for the counting of every 5 enslaved people as 3 people for the purposes of representation in the House of Representatives.
Southern states such as Georgia and North and South Carolina refused to sign the Constitution unless the above were added to protect their slaveholding policies.
A mixed economy is one that has no government control "<span>of many industries that are owned by private individuals," since this still allows the government to control other aspects of the economy. </span>
It is now believed that the largest contributing factor to the decline of the Indus Valley civilization was an outbreak of disease--since there were no treatments and the density of the civilization led the disease to spread very quickly.
This is in fact true, Hawaii was just U.S territory for over 50 years before it became an official state.