the question is in the screenshot

9909.9

Step-by-step explanation: 9,800 divided by 140 is 70. so the diameter of the semicircle is 70. then you divide 70 by 2, which is 35. then multiply 35 by 3.14, which is 109.9. divide 109.9 by 2 since it’s a semicircle which comes out to 54.95. since there are 2 semicircles, multiply 54.95 by 2. which comes out to 109.9. then add 109.9 and 9,800!

9 x 8 divided by (5-3)=36

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column