Awaterfall has a height of 1500 feet. a pebble is thrown upward from the top of the falls with an initial velocity of 20 feet per second. the height, h, of the pebble after t seconds is given by the equation h=-16t+20t+1500. how long after the pebble is thrown will it hit the ground?

1- 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.2- 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 the first question?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?