The table shows the number of phones sold by a small cell phone provider in various years. Use a calculator to write a quartic model for the number of phones sold in a given year since 1996 and use the model to estimate the number of phones sold in 2005. Answers:
P(x) ≈ −0.44x4 + 10.10x3 − 75.75x2 + 232.11x − 103.94
The estimated number of phones sold in 2005 is 325.

P(x) ≈ −0.25x3 + 8.48x2 − 42.28x + 191.29
The estimated number of phones sold in 2005 is 339.

P(x) ≈ −0.44x4 + 10.10x3 − 75.75x2 + 232.11x − 103.94
The estimated number of phones sold in 2005 is 316.

P(x) ≈ 0.25x3 − 8.48x2 + 42.28x − 191.29
The estimated number of phones sold in 2005 is 316.

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

The weight of 46 new patients of a clinic from the year 2018 are recorded and listed below. construct a frequency distribution, using 7 classes. then, draw a histogram, a frequency polygon, and an ogive for the data, using the relative information from the frequency table for each of the graphs. describe the shape of the histogram. data set: 130 192 145 97 100 122 210 132 107 95 210 128 193 208 118 196 130 178 187 240 90 126 98 194 115 212 110 225 187 133 220 218 110 104 201 120 183 124 261 270 108 160 203 210 191 180 1) complete the frequency distribution table below (add as many rows as needed): - class limits - class boundaries - midpoint - frequency - cumulative frequency 2) histogram 3) frequency polygon 4) ogive