Ascuba diver is 30 feet below the surface of water 10 seconds after he entered the water and 100 feet below the surface after 40 seconds. find the rate of change including units.

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?

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion

Which expression is equivalent to 64 - 9x^2?