D 23
On a sunny day, Bill wants to find the height of a tree. He walks feet along the shadow that the tree casts
until his shadow ends at the same point as the tree's shadow. Bill is 6 feet tall and the length of his shadow
is 8 feet. How tall is the tree?
a) Draw a diagram that represents the problem. Show the known quantities and use a variable to indicate
the height of the tree.
b) Write an equation/proportion involving the unknown quantity.

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?

The statements below can be used to prove that the triangles are similar. ? △abc ~ △xyz by the sss similarity theorem. which mathematical statement is missing? ∠b ≅ ∠y ∠b ≅ ∠z

You use technology ans find a sum of 6.712e-8. write this sum in standard form