Gives the distance of a boat from the dock i seconds after leaving the dock. Distance is measured in meters.
Here is a graph that represents d.
80
60
Select all statements in function notation
that represent the situation.
distance (meters)
40
20
20 40 60 80 100 120 140 160 180
time (seconds)
A. d(30) = d(70)
B. d(10) = 20
C. d(90) = 60
HP Audio Switch
D. d(t) = 10 when t is 20.
Speakers
Microphones
E. d(0) = 0
Internal Speaker
F. d(0) = 170
Digital Output
Connected
G. d(170) = 0

the 4th choice is the correct one

step-by-step explanation:

if you need just tell me and i will come to the rescue.

step-by-step explanation:

lol.

it's ok we all do this sometimes.

-aparri

the value of x is 9 ⇒ answer b

step-by-step explanation:

* we can solve this problem using cosine and sine rule

- in δ abc

∵ ab = 36 , bc = 28 , ac = 16

- lets find the measure of angle b using the cosine rule

∵ cos b = [ab² + bc² - ac²]/2(ab)(bc)

∴ cos b = [36² + 28² - 16²]/2(36)(28)

∴ cos b = 19/21

∴ m∠b = cos^-1(19/21) ≅ 25°

- lets find the measure of angle a using the sine rule

∵ sina/bc = sinb/ac = sinc/ab

∴ sina/28 = sin25°/16 ⇒ by using cross multiplication

∴ sina = 28 × sin25°/16

∴ sina = 0.7396

∴ m∠a = sin^-1(0.7396) ≅ 48°

- from the figure m∠abd = m∠dbc

∵ m∠abc = 25°

∴ m∠abd = 25°/2 = 12.5°

- in δabd

∵ m∠a = 48° , m∠abd = 12.5°

∵ the sum of the measures of the interior angles of any δ is 180°

∴ m∠adb = 180° - (48° + 12.5°) = 119.5°

∵ ab = 36

∵ ad = x

- use the sine rule to find x

∵ sin∠adb/ab = sin∠abd/x

∴ sin119.5°/36 = sin12.5°/x ⇒ by using cross multiplication

∴ x = 36 × sin12.5°/sin119.5° = 8.95 ≅ 9

* the value of x is 9