Find the solution to the differential equation
db/dt+4b=20
with b(1)=30

Solution:

Step-by-step explanation:

Given:  

with B(1)=30

The differential equation in form of linear differential equation,

Integral factor, IF:

General Solution:

P=4, Q=20

IF=

Solution:

B(1)=30 , Put t=1, B=30

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.