Logan's birthday party will cost $15 if he invites 5 guests. How many guests can there be, at most, if Logan can afford to spend a total of $30 on his birthday party? Assume the relationship is directly proportional.

Standard deviation of 19,29,21,22,23

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?