Please help? I don’t understand

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

3 0

The answer is 70cm.
Step 1). If the total area is 150cm2 then each square is 25cm2. I found that out by doing 150(total area) divided by 6(number of congruent squares).
Step 2) If the area of one square is 25 its side length is 5. I found that out by square rooting 25 because the are of a square base times height and if the square is congruent it means the base and height are the same.
Step 3) count the sides of the square that make up the perimeter of the shape. I found the answer by doing 5 times 14 which gives you 70 and that is the answer

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What is the relative frequency of students that studied independently for more than 2 hours to the total number of students that

AlladinOne [14]

This question is incomplete.

The complete question says;

The two-way table shows the number of hours students studied and whether they studied independently or with a study group.

What is the relative frequency of students that studied independently for more than 2 hours to the total number of students that studied independently?

a) 0.4 c) 0.25

b) 0.33 d) 0.11

Table is attached as image

Answer: C (0.25)

The number of students that studied for more than 2 hours as given in the table are 4.

The total number of people that studied independently include those that studied less than 2 hours and those that studied for more than 2 hours.

Those that studied less than 2 hours independently are 12.

Those that studied more than 2 hours independently are 4.

Hence the total number of people that studied independently is 16.

Therefore the relative frequency of students that studied independently for more than 2 hours to the total number of students that studied independently would be = 4/16 = 1/4 = 0.25.