Which of the following are polynomial functions? check all that apply. a. f(x) =3/5x^4 -18x^2 +5-10/x^2 b. f(x) = -x^3+5x2 +7square rooot x-1 c. f(x) = x^-2 + 15x-3 d. f(x) = 5.3x ^2+ 3x - 2 e. f(x) = 4x^4-10

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

its an acute right triangle

step-by-step explanation:

i need more details sorry

step-by-step explanation:

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