A rope from the top of a flagpole is attached to a stake in the ground 19 feet from the pole. If the rope is 28 feet long, how tall is the pole?

20.5

Step-by-step explanation:

a²+b²=c²

a²+19²=28²

a²+316=784

subtract 361 from both sides

a²=423

√423=20.5

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8