CAN SOMEONE PLEASE HELP ME WITH THISS WITH THE LAST TWO QUESTION PLEASE

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

If square root x = -7, then x= -49 true or false

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here