At a car repair shop, the cost of repair depends on the time the mechanic works. which of the following shows this idea in function notation? pleas show all work. a. number of cars (time) b. time(cost) c. time(number of cars) d. cost(time)

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?

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

What is the cube root of -1,000p^12q3? -10p^4 -10p^4q 10p^4 10p^4q