Student practice hours

name mon tues wed thu fri
mick 4 4 3 4 4
ashley 4 3 2 4 5
aj 4 4 4 4 3
isabella 4 5 3 4 4

all clark-atlanta band students are required to document their practice time in the band hall. the band averages 4 hours of practice per day during the week. four students' logs are chosen at random. based on the table above, find the difference between the mean of the sample and the entire band.
a.
the difference is 0.9 hours.
b.
the difference is 0.2 hours.
c.
the difference is 0.05 hours.
d.
the difference is 0 hours.

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.