Find the length of arc AB.
120
10

Step-by-step explanation:

the length s of the arc AC is given as :

s = r. 0

where

r = 10 is radius

0 = 90°

= π/2 rad is angle

s = 10. π/2

= 5π

= 5.3.14

= 15.7 ~ 16

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

2x + 8

step-by-step explanation: