If an astronomer's hypotheses provide a calculus consistent with the observations,
A. the astronomer's work is sufficient.
C. the present author is wrong.
B. the astronomer's work is faulty.
D. the observations are wrong.

Ablock of wood is a cube whose side is x in. long. you cut off a 1-inch thick piece from the entire right side. then you cut off a 3-inch thick piece from the entire top of the remaining shape. the volume of the remaining block is 2,002 in3. what are the dimensions of the original block of wood?

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?