When a bakery opened this morning the ratio of pineapple muffins to the number of mango muffins was 3: 2. after 144 pineapple muffins were sold, the ratio of the number of pineapple muffins to the number of mango muffins changed to 3: 5. how many pineapple muffins were there when the bakery opened in the morning?
answer is 240, but we need ot know how to get to the answer.

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.