A ladder is propped up against a house. The top of the ladder rests 18 ft above the ground. The base of the ladder is 4 feet from the building. What is the length of the ladder?

18.44ft

Step-by-step explanation:

a²+b²=c² where c is the hypotenuse

so according to this

18²+4²=c²

c²=340

c= 18.44

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

853.3

step-by-step explanation: