Select all the relations that represent a function, (1,3), (2,5), (2,7) (4.9)
(1,3), (2,5), (3,7) (4.9)
(1,3), (1,5), (1,7) (4.9)
(1,3), (2,3), (3, 3) (4,3)
(1,2).(2,5), (2, 1) (4,5)

Zach spent 2/3 hour reading on friday a 11/3 hlurs reading on saturday. how much more time did he read on saturday tha on friday

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?

If the radius of a circle is 6 inches how long is the arc subtended by an angle measuring 70 degree