Someone please help me understand this

radius=9cm

d=18 cm

Step-by-step explanation:

∅=l/r

∅=360-120=240°=240×π/180=4/3 π

4/3 π=37.68/r

r=37.68 ×3/(4π)=9.42×3/π=28.26/π ≈9 cm

d=2×9=18

4.

area of sector=πr²×∅/2π=r²∅/2

75.36=12² Ф/2=72 ∅

∅=75.36/72 =6.28/6=3.14/3≈1.0 467 radians.

l=r∅=12×3.14/3=12.56

length of arcNRP=12.56 cm

m ∠NQP=π/3 radians

step-by-step explanation:

$11.01

$16

$15

$4

hope this

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.