Last week the number of bacteria in a petri dish was 2.25×10^2. This week the number of bacteria in the petri dish is 2.75×10^5. How many times more bacteria are in the petri dish this week? Round the decimal to the nearest tenth.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.