The mitchells are renting a boat for the day. it costs $100, plus $20 for each hour. they have to pay for a whole hour even if they are not out there for a whole hour. for example if they boat for 3 and a half hours, they have to pay for 4 hours. they don't want to spend more than $250 for the day. how many hours can they boat? write an inequality and solve.
a)100 + 20x ≤ 250. they can boat for 7 hours.
b)100 + 20x ≥ 250. they can boat for 8 hours.
c)100 + 20x ≤ 250. they can boat for 8 hours.
d)100 + 20x ≥ 250. they can boat for 7 hours.

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?