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Simora [160]
3 years ago
11

Train A is traveling at 39 mph. Train B is traveling at 65 mph how man more hours will it take for train A than train B to trave

l 195 miles
Mathematics
1 answer:
pav-90 [236]3 years ago
8 0
Train A will take 2 more hours than train B. Train A will take 5 hours while train B will only take 3 hours.
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A guitar string is plucked at a distance of 0.6 centimeters above its resting position and then released, causing vibration. The
liubo4ka [24]

Answer:

The equation that represents the motion of the string is given by:

y =Ae^{-kt}\cos(2\pi ft)     .....[1] where t represents the time in second.

Given that: A = 0.6 cm (distance above its resting position) , k = 1.8(damping constant) and frequency(f) = 105 cycles per second.

Substitute the given values in [1] we get;

y =0.6e^{-1.8t}\cos(2\pi 105t)  

or

y =0.6e^{-1.8t}\cos(210\pi t)  

(a)

The trigonometric function that models the motion of the string is given by:

y =0.6e^{-1.8t}\cos(210\pi t)

(b)

Determine the amount of time t that it takes the string to be damped so that -0.24\leq y \leq0.24

Using graphing calculator for the equation

y =0.6e^{-1.8x}\cos(210\pi x)

let x = t (time in sec)  

Graph as shown below in the attachment:

we get:

the amount of time t that it takes the string to be damped so that -0.24\leq y \leq0.24 is, 0.5 sec


4 0
3 years ago
Pls solve I need it solved rn show work urgent PLS*****
omeli [17]

Answer:

16. y=-5x-20; 17. y=6x+18, or factored y=6(x+3)

Step-by-step explanation:

Your slope is -5

y=-5x+b, solve for b by pluging the point (-3,-5) in for x and y

-5=-5(-3)+b, solve for b

-20=b, now rewrite the equation

y=-5x-20

Your slope is 6

y=-5x+b, solve for b by pluging the point (-3,-0) in for x and y

0=6(-3)+b, solve for b

18=b, now rewrite the equation

y=6x+18, or factored y=6(x+3)

5 0
3 years ago
I need help!! <br><br> 6r^(2)-3r-27=-9
Harrizon [31]

Answer:

Step-by-step explanation:

Solution

= -3/2

= 2

3 0
3 years ago
A parasail is at 200.6 feet above the water. After 5 minutes, the parasail is at 120.8 feet above the water. What is the change
kow [346]

Answer:

   Change in height of the parasail after 5 minutes = 79.8 feet.

Explanation:

  Change in height = Absolute value of the differences of the initial height and final height.

  Initial height of parasail = 200.6 feet.

  Final height parasail  = 120.8 feet.

  Change in height of the parasail = 200.6 - 120.8 = 79.8 feet.

   Change in height of the parasail after 5 minutes = 79.8 feet.

5 0
3 years ago
Angle A and angle B are complementary angles of right triangle ABC, cos A = 0.83, and cos B = 0.55. What is sin A + sin B?
mezya [45]
Ya she's right it's C bc I had the same thing on my quiz and I got it right
6 0
3 years ago
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