(a) A tram moved downward 72 meters in 8 seconds at a constant rate. What was the change in
the tram's elevation each second?
II meters
(b) In a lab, a substance was heated by 6 °C each hour for 48 hours. What was the total change
in temperature?

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

they are simplified

step-by-step explanation:

part a: 1.08

part b: 27.59