2.5 km= M

Help me please

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

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.

Bring the fraction a/a-4 to a denominator of 16-a^2