The number of bacteria in a culture can be modeled by the function N(t) = 28ť - 30t + 160, where t is the temperature, in degrees Celsius, the
culture is being kept. A scientist wants to have fewer than 200 bacteria in a
culture in order to test a medicine effectively. What is the approximate domain of
temperatures that will keep the number of bacteria under 200?
А
"1.01°C B
-0.90°C < t < 1.97°C
*0.86°C < t < 1.93°C
D
"0.77°C < t < 1.85°C

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

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