问2道SAT数学题目.（1）If 537(的102次方) were calculated,it would have 2

问2道SAT数学题目.
（1）If 537(的102次方) were calculated,it would have 279 digits.What would the digit farthest to the right be(the ones digit)?
A 1 B 3 C 4 D 7 E 9
(2) A performance was rated on a 3-point scale by an audience.A rating of 1 was given by 30% of the audience,a rating of 2 by 60%,and a rating of 3 by 10%.To the nearest tenth,what was the average of the ratings?
A 1.2 B 1.5 C 1.8 D 2.0 E 2.2