Which equation models the problem below if c represents the number of babies whose eyes are closed? There are 12 babies in a photograph, and 9 of them have their eyes open. How many babies have their eyes closed? c – 9 = 12 12 + c = 9 9 – c = 12 9 + c = 12

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years