You made a cardboard tree that is 48 inches tall to use as a stage prop for a play. You need to make a diagonal brace that connects a 28-inch long
horizontal brace to the top of the tree. Find the length of the diagonal
brace to the nearest tenth of an inch.

55.6 inch

Step-by-step explanation:

the cardboard tree, the horizontal base and the diagonal would form a right angled triangle.

the carboard tree would be the height

the horizontal base would be the base

the diagonal would be the hypotenuse

the length of the diagonal base can be determined using the Pythagoras theorem

the Pythagoras theorem : a² + b² = c²

a = base

b = height

c = hypotenuse

48² + 28² = 3088

c = √3088 = 55.6 inch

all of the measures need to be converted to the same measure; such as inches. if you do that it is easy to determine which is the longest, 2500 mm which is approximately 97.5 inches.