Danny made a mistake in the following problem. the mistake was made in line only input the number of the first incorrect line. line 1 21 + 35 ÷ 7 + 6(2) line 2 21 + 5 + 6(2) line 3 21 + 11(2) line 4 21 + 22 line 5 43 numerical answers expected!

Line 3
since he added which is against the order of opreation rule he was supposed to multiply first then add
again what he was supposed to do is
Line 2:21+5+6(2)
Line 3:21+5+12

12.4%

Step-by-step explanation:

The results from the random sample counts 124 from a total of 1000 people that wear contact lenses. This means is the percentageof the people in the sample that wear contact lenses.Because it is a random sample, it is suppose to reflect the behavior of the total population. Then we can expect or predict  similar percentage of Americans wearing contact lenses (12.4%).