Cho chuỗi số ∑n=1+∞3n−15n có tổng riêng Sn=15+15.35+15.(35)2+...+15.(35)n−1 . Tổng của chuỗi số đã cho là:

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4

Find the missing factor. write your answer inexponential form.9^2=9^4×