Answer:
a. 
b. 
c. 
d. 
Step-by-step explanation:
a) xy' -4y = 2 x^6

b) y' - 5y = 4e^7x

c) dy/dx + 2y = 2/(1+e^4x)

d) 1/2 di/dt + i = 4cos(3t)

Answer:
The Multiplication equation to find the number of hours taken to travel the distance is
.
It will taken <u>15 hours</u> by Russian ice breaker to travel a distance of 82.5 km through the ice.
Step-by-step explanation:
Given:
Thickness of the ice = 2.3 m
Speed while moving forward = 5.5 km/h
Distance to travel through the ice = 82.5 km
We need to write and solve the multiplication equation to find the number of hours taken to travel the distance.
Solution:
Let the number of hours taken to travel the distance be 'x'.
Now We know that;
By Distance formula;
Distance traveled is equal to Speed while moving forward multiplied by the number of hours taken to travel the distance.
framing in equation form we get;

Hence The Multiplication equation to find the number of hours taken to travel the distance is 
On Solving above equation we get;
Dividing both side by 5.5 we get;

Hence It will taken <u>15 hours</u> by Russian ice breaker to travel a distance of 82.5 km through the ice.
try c im sorry if im wrong i tried
Answer:
3+sqrt(13/2)
3-sqrt(13/2)
Step-by-step explanation:
2 (x-3) ^2 =13
Divide each side by 2
2/2 (x-3) ^2 =13/2
(x-3) ^2 =13/2
Take the square root of each side
sqrt((x-3) ^2) =±sqrt(13/2)
x-3 = ±sqrt(13/2)
Add 3 to each side
x-3+3 = 3±sqrt(13/2)
x = 3±sqrt(13/2)