You can use a tangent:
We have opposite = 17 and adjacent = x.
substitute:
cross multiply
multiply both sides by √3
divide both sides by 3
Use the Pythagorean theorem:
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Other method.
triangle.
The sides are in the ratio 
Therefore
Answer:
.01
Step-by-step explanation:
There are 3600'' in 1°. 36"/3600"= .01°
Answer:
50 liters
Step-by-step explanation:
If x is the volume of 20% acid, then:
x (0.20) + 20 (0.45) = (x + 20) (0.30)
0.2x + 9 = 0.3x + 6
3 = 0.1x
x = 30
30 liters of 20% acid are needed, so there will be a total of 50 liters of 30% acid.
(x+4) + ((x-15)+4)= 41
2x-7= 41
2x= 48
x= 24
The answer is choice D.
Cause it can't be calculate.
