What is 300,000+5,000+20+6 in standard form?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog