If s denotes the length of the arc of a circle of radius r subtended by a central angle \theta , find the missing quantity.

s = 7.02 meters, \theta = 2.6 radians, r = ?
a. 0.37 m
b. 3.6 m
c. 1.35 m
d. 2.7 m

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: