A student was asked to round 80.13 to the nearest tens. Their answer was 70.
What mistake, if any did they make?
When rounding down, they dropped the number that should have stayed the same.
They just took off the extra numbers, rather than rounding.
They rounded using the last number instead of the number just to the right of the spot to round.
They didn't understand the difference between tens and tenths or hundreds and hundredths,
They didn't make a mistake.

no he/she did not make a mistake he got it right 70

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.