A 1-kg standard cart collides with a 5.7-kg cart initially at rest on a low-friction track. After the collision, the standard cart is at rest and the 5.7-kg cart has a velocity of 1.5 m/s to the left. Part A What was the initial velocity of the standard cart? Suppose that the positive direction is the direction to the right. Express your answer with the appropriate units.

1 is b and 2 is d

step-by-step explanation:

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.