The driver of a car travelling downhill on a road applies the brakes. The speed s of the car in km h-1, t seconds after the brakes were applied, is given by
s(t)=-4t2 + 12t + 80.
a How fast was the car travelling when the driver applied the brakes?
b After how many seconds was the speed of the car 88 kmh-1? Can you explain
your answer?
< After how many seconds did the car reach its maximum speed?
d What was the maximum speed reached?

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

c. side angle side. u shares the same sides