At the start of 2012, the US federal budget had a deficit of more than $1.5×1013. Convert this number to decimal form.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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?

If value of cos330° is √3/2 then find tan165°.