Answer quick & 50 points!
seven-year-old students at an elementary school were given a 10-yard head start in a race. the graph shows how far the average student ran in 30 seconds.
which statement best describes the domain of the function represented in the graph?
10 ≤ x ≤ 60, or x is from 10 to 60
7 ≤ x ≤ 60, or x is from 7 to 60
7 ≤ x ≤ 10, or x is from 7 to 10
0 ≤ x ≤ 10, or x is from 0 to 10

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

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.

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?