Please Help! The rate at which certain bacteria decreases can be modeled as
f(x)= 1/4(4)^x
where x represents the time in minutes and f(x) is the amount of bacteria.

What is the average rate of change between 2 and 4 minutes?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

Which graph depicts the path of a projectile