Help me please I need to go to sleep

What is the area of triangle abc if a = 8, b = 11, and c = 15?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?