Answer:
C
Step-by-step explanation:
the hypotenuse and the leg of the first right angle are congruent to the other triangle's.
ANSWER IS 73 DEGREE
BECAUSE IF WE WILL ADD 42 AND 65 WE WILL GET 107
THEN WE HAVE TO SUBTRACT 180 FROM 107
WE WILL GET 73
HOPE IT WILL HELP YOU
Answer:
(a) 
(b) 
Step-by-step explanation:
Given
--- Volume of tank
--- Brine solution
--- Rate in, in gallon/min
--- Rate out, in gallon/min
Required
Determine A(t)
First, calculate the rate in (R in) and (R out) in lb/min



R(out) is calculated by multiply the rate at which brine leaves the tank (lb/gal) * R2
So, we have:



The change in the amount of brin e in the tank at time t is given as:


Rewrite:

Multiply through by dt
![dA = [15 - \frac{A}{100}]* dt](https://tex.z-dn.net/?f=dA%20%3D%20%5B15%20-%20%5Cfrac%7BA%7D%7B100%7D%5D%2A%20dt)
Make dt stand alone


Express as exponents

Multiply through by 100



Apply initial conditions

Substitute 0 for t in: 





Substitute 15 for c in 


Factorize:

How long to empty the tank
Set A to 0

Divide through by 1500

Collect Like Terms

Take ln of both sides



Answer:
n=-16
Step-by-step explanation:
Add 4 on each side:
n/2 = -12+4
n/2 = -8
Multiply 2 on each side:
n=-16
B. 5, 9
x = 5
y = 9
y - x = 4
(9) - (5) = 4
True
hope this helps