. A substance experiences rapid changes in temperature over the course of an experiment to test its electrical conductivity.

At the start of the experiment the substance is measured to be 50°C, and by the end of the experiment, its temperature is measured as -60°C.

9a
How does the temperature change from the start to the end of the experiment?

Represent a decrease in temperature with a negative number

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