A histogram is drawn with three columns whose widths are in the ratio 1: 2:4. The frequency densities of these classes are in the ratio 16:12:3, respectively,
A. Given that the total frequency of the data is 390, find the frequency of each class.

B. The classes with the two highest frequencies are to be merged and a new histogram drawn. Given that
the height of the column representing the merged classes is to be 30 cm, find the correct height for the
remaining column.

C. Explain what problems you would encounter if asked to construct a histogram in which the classes with
the two lowest frequencies are to be merged.

What is [tex] {7}^{98 + \sqrt{4} } - 3 \times (64 \div 2 + 4 - 36) \times a = a + 36[/tex]?

Read the excerpt from the strange case of dr jekyll and mr. hyde what do dr. jekyll's thoughts reveal about him in this excerpt? [t]he inmates of my house were locked in the most rigorous hours of slumber, and i determined, flushed as i was with hope and triumph, to venture in my new shape as far as to my bedroom. i crossed the yard, wherein the constellations looked down upon me, i could have thought, with wonder, the first creature of that sort that their unsleeping vigilance had yet disclosed to he is jealous of those who can sleep through the night. he is revered for his scientific advances. he is interested in studying the movements of the stars he is proud and enthusiastic about his initial results.

What is the value of x? enter your answer in the box. x =