18.D
19.A
20.C
21.B
theses are going to be your answers
Answer:
Electronic measurement tools accurately store a large volume of data very quickly.
Explanation:
Electronic measurement tools are important devices used in taking records of data. They are very good measuring tools because they can measure a large amount of data very quickly and in a very precise manner. Examples include; multimeters, voltmeters, oscilloscopes, etc.
Their sizes might vary but a general attribute to them all is the speed at which data is recorded and the precision with which they are measured. Scientists most times use these devices to take measurements.
C. It led in a mass migration of African Americans to the Midwest.
Answer:
D. $29.40
Explanation:
Calculation for the mean cost per customer for the performance
Using this formula
Mean cost per customer=[(Number of tickets purchased*Relative frequency)]*Performance cost
Let plug in the formula
Mean cost per customer=[(1*0.20)+(2*0.45)+(3*0.10)+(4*0.20)+(5*0.05)]*$12
Mean cost per customer=(0.2+0.9+0.3+0.8+0.25)*$12
Mean cost per customer=2.45*$12
Mean cost per customer=$29.40
Therefore the mean cost per customer for the performance will be $29.40
