In a class of 20 students, on average, 4 will be left-handed. If a class includes 14 "lefties", estimate how many students a
2 answers:
For this case, we must indicate how many students there are in the class knowing that it includes 14 "lefties". For this, we make a rule of three:
20 -------------> 4
x ---------------> 14
Where the variable "x" the number of students in the class.
Thus, if the class includes 14 left-handers, then according to the base average, the class will have a total of 70 students.
Answer:
70 students
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Answer:
A. Between 3.0 and 3.5 and between 4.0 and 4.5
Step-by-step explanation:
The zeroes of a function occur whenever a value of x returns zero. To predict where the zeroes lie, determine the interval(s) where the function crosses the x-axis. This occurs when either goes from a negative value to a positive value or vice versa.
From and
, the y-values go from 4.0 (positive) to -0.2 (negative), respectively. Therefore, there must be a zero in this interval.
From and
, the y-values go from -0.8 (negative) to 0.1 (positive), respectively. Therefore, there must also be a zero in this interval.
Thus, the zeros of this function occur between 3.0 and 3.5 and between 4.0 and 4.5, leading to answer choice A.