Which statement is true?

a.
an isosceles trapezoid is a rectangle because its opposite sides are parallel.
b.
an isosceles trapezoid has perpendicular diagonals.
c.
an isosceles trapezoid has opposite angles that are congruent.
d.
an isosceles trapezoid has congruent base angles.

Acaterer charges $500 plus $30 per guest to cater a wedding. walt and traci don't want to spend more than $8000 on catering. write and solve an inequality in terms of the number of guests, g, that can be invited. a) 30g ? 8000; g ? 267 b) 500g < 8000; g < 16 c) 500 + 30g < 8000; g < 250 d) 500 + 30g ? 8000; g ? 250