The set of all 3-digit numbers made using only the digits 1 and 2 (each can be used, of course, more than once.)

Step-by-step explanation:

Consider that there are three blanks and such that each blank has to be filled by either any one of the two numbers i.e., 1,2.

Since each blank can be filled in 2 ways (repetition of digits are allowed),

Total number of 3-digit numbers formed by using 1,2 are

= (2) (2) (2) = 8

Total number of 3-digit numbers formed by using 1,2 are  8

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.