An electronic device that is ventilated by air flowing over the item and removing excess heat is said to be
a. air cooled.
b. air humidified.
c. air micro-waved.
d. air blown.

Zac wanted to determine the measure of r and of ? r in the triangle below. to fine the measure of r, zac sets up the problem.42^2 + 24^2 = r 2. determine whether zac set the problem up correctly.