Answer:
40
Step-by-step explanation:
a^2+b^2=c^2
therefore c^2-b^2=a^2
41x41=1681
9x9=81
1681-81=1600
Sqrt1600=40
ok so if 2/3 of her class went and thats 60 then what is half of 60?
30
1/3 of her class represents 30 kids and 1/3 is missing
and 60+30=90
there are 90 kids. hope this helps
Answer:
D is the answer
Step-by-step explanation:
Answer:
±2.18 cm
Step-by-step explanation:
The definition of the sine of an angle (θ) is ...
Sin = Opposite/Hypotenuse
Then the hypotenuse (h) is found from ...
h = Opposite/sin(θ)
Differentiating with respect to θ gives ...
dh/dθ = Opposite×(-cos(θ)/sin²(θ))
For the given numbers, this is ...
dh/dθ = (36 cm)×(-√3/2)/(1/2)² = -72√3 cm/radian
The error of ±1° corresponds to ±π/180 radians, so the error is estimated to be ...
error = (dh/dθ)Δθ = (-72√3 cm/radian)(±π/180 radians) = ±0.4π√3 cm
error = ±2.18 cm
