Hey guys I need help with this exercise can someone plz help me for 20 points?? Also write the explanation to your answer plzz!

Math problem: Pirate Captain William Hawk left his hat on Treasure Island. He sailed 18km northeast through the Forbidden Straight, the 11km southeast to his home before realizing it was missing. If he sent his parrot to fetch his hat, how far did it need to fly?

21.1 km

Step-by-step explanation:

The northeast line and the southeast line will make a right angle so use the Pythagorean Theorem: a^2 + b^2 = c^2 and calculate c.

18² + 11² = c²

324 + 121 = c²

445 = c²

c = 21.1 km

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

2x^2+5x+17

your welcome. : )