Elena would like to know the average height of seventh graders in her school district . She measures the heights of everyone in random sample of 29 students . The mean height of elenas sample is 61 inches , and the MAD (mean absolute deviation) is 2 inches
Select all the true statements . Make your selections bold .
A ) the median height of the sample must be between 59 and 63 inches .
B ) another random sample of 20 students is likely to have a mean between 57 and 65 inches .
C ) the mean height of these 20 students is likely to be the same as the mean height of all students district .
D ) the mean height of these 20 students is likely to be the mean height of second random sample of 20 students .

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12