How do you write 260,000 in scientific notation?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?