The last answer choice is a function because none of the x-values repeat.
#3 4*5 1/3 = 21 1/3
#4 I can't see number four.
Testing my knowledge on this one.
A - when doing a 180 degree rotation, the coordinates (x,y) would become
(-x,-y), in other words, the inverse of the numbers in the x and y
places, (-1,2)->(1,-2)
B - when reflecting over the x axis, only the y coordinate inverts, (x,y) becomes (x,-y), (1,-2)->(1,2)
Answer:
21.897 to the nearest hundredth is 2.19
Answer:12.59
Step-by-step explanation:
enter image source here
From the diagram you can see that we have constructed a right triangle, with height A and base 15.
Length of shadow = 15 feet.
Height of flagpole = A.
We know the angle of elevation is
40
∘
. Using this angle and the tangent ratio, we can find A.
tan
(
40
∘
)
=
opposite
adjacent
=
A
15
∴
tan
(
40
∘
)
=
A
15
Rearranging:
A
=
15
tan
(
40
∘
)
By calculator:
A
=
12.59
feet. ( 2 d.p.)