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9514 1404 393

  see below

Step-by-step explanation:

It is convenient to sort the data. This aids counting the number of data points in each bin, and in figuring how to define the bins.

Here, there are 20 data values that range from 15 to 64, a rangel of 49. The chart in the problem statement suggests that 5 bins is a suitable number, so bins of width 10 would cover the range.

The bin boundary should always be defined so that no data point falls on the boundary. Here, we can define bins of width 10 that have boundaries that satisfy ...

  x = 10n +14.5 . . . . n = 0 to 5

Then your chart is filled as follows:

  interval, values, #

  14.5–24.5, {15, 19, 20}, 3

  24.5–34.5, {27, 30, 32, 32, 33}, 5

  34.5–44.5, {38, 39, 40, 44}, 4

  44.5–54.5, {45, 45, 48, 53, 54}, 5

  54.5–64.5, {60, 62, 64}

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

i used to know how to do this in 7th but i forget easily

step-by-step explanation: