15. The intensity of light at its source is 100%. The intensity, I, at a distance d centimetres from
the source is given by the formula I = 100d-2.
Use the formula to determine the intensity of
the light 23 cm from the source.

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.

Factor this polynomial completely x^2-64

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.