What type of triangle is formed by joining the points D(7, 3), E(8, 1), and F(4, -1)? A.
equilateral triangle
B.
isosceles triangle
C.
right triangle
D.
acute scalene triangle
E.
obtuse scalene triangle

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?