Answer:
Mass and density
Explanation:
Density of an object is defined as its mass per unit volume. Mathematically, the relation is given by :

m = mass and V = volume
If we know the density of the Eraser and its mass, we can easily find its volume. Hence, the two tools are mass and density.
Answer:
I would say maybe the second choice that is listed in the picture.
Explanation:
I know that "Cracking" involves spreading voters of a particular type among many districts in order to deny them a sufficiently large voting bloc in any particular district.
Answer:
The government of the U.S. State of Oklahoma, established by the Oklahoma Constitution, is a republican democracy modeled after the federal government of the United States. The state government has three branches: the executive, legislative, and judicial. Through a system of separation of powers or "checks and balances," each of these branches has some authority to act on its own, some authority to regulate the other two branches, and has some of its own authority, in turn, regulated by the other branches.
The state government is based in Oklahoma City and the head of the executive branch is the Governor of Oklahoma. The legislative branch is called the Legislature and consists of the Oklahoma Senate and the Oklahoma House of Representatives. The Oklahoma Supreme Court and the Oklahoma Court of Criminal Appeals are the state's highest courts.
Before 1900, there are already several states that made their attempts to lessen the working hours of mothers. A movement was created and sought the help of people to help provide for widowed mothers so they could take care of their children. The Mother's Pension Program helped pushed the welfare of mothers and also children who became orphans. The first mother's pension law happened in Illinois last 1911. It was adopted by other States primarily to help the children who were left by their fathers and orphans, and dependent mothers.