What is the surface area of this composite solid? A rectangular prism with a length of 11 feet, width of 11 feet, and height of 2 feet. A square pyramid with triangular sides with a height of 7 feet. square feet 242 319 363 517

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?