Scientists discovered a large star 400,000 light years from earth. a light-year is about 5,880,000,000,000 miles. what is the distance of the large star from earth in scientific notation?

What is the slope of the equation y =

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g