Answer:
7.80 would be your answer. because 78 is closer to 80 than 70.
Step-by-step explanation:
So, to 1 d.p. 7 is about 23% out of 30. (7 of 30=23%)
7/30 x 100 =23.3333333333% or 70/3%.
I think its A i'm sorry if its wrong
5x^4+7x^3-6x^2