Can anyone help me in 35_q pls

Step-by-step explanation:

a. The height of each bar is marked with the number of students it represents. So, the total number of students is the total of the numbers indicating bar height:

  3 + 14 + 21 +12 + 6 = 56

56 students took the exam.

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b. The class interval or class width is the difference between the scores at the edges of the class. Here, the first class has an interval of 60 -50 = 10. All the other classes have the same interval.

The class interval is 10.

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c. The midpoint of a class is the average of the endpoints. For the first class, it is ...

  (50 +60)/2 = 55

The midpoint for the first class is 55.

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d. There are two bars below 70. The numbers at the top of those bars are 3 and 14, so the total number of students that scored below 70 is ...

  3 + 14 = 17

17 students earned a score less than 70.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°