HELP PLEASE Write 9×10^– 3 9×10^– 4 in scientific notation

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?