I need the answer fast pls help

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The curved part of the figure is the semicircle what is the best approximation for the area of this figure