[填空题]
On the first day of September, 20hzrk i*wso;ogf -9u.f ( (dahbx ,b:g119, Gloria planted 5 flowers in her garden. zf-o8y st8w;i The number of flowers, which she plants at every day of the month, forms an arithmetic sequence. The number of flowers she is going to plwt-8yfiz o 8s;ant in the last day of September is 63.
1.Find the common difference of the sequence.
d= .
2.Find the total number of flowers Gloria is going to plant during September.
$S_{30}$= .
3.Gloria estimated she would plant 1000 flowers in the month of September. Calculate the percentage error in Gloria's estimate.
ϵ= %
