Pls help me need help

[See Below]

Step-by-step explanation:

✦ So think of finding a semi-circle like a regular circle. Just Find the Circumference like usual:

  ✦ 2 × π × 5 = 31.41

✦ Now that we've done that all you have to do is divide by 2 since a semi-circle just means half of a regular circle:

  ✦ 31.41 ÷ 2 = 15.707 or If rounded 15.705

✦ You could also use the formula for a semi-circle:

  ✦ ½ × 2 × π × r

~Hope this helps Mate. If you need anything else feel free to message me.

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3