If the choices are the following:
tan(22.6o) = a/13
tan(22.6o) =13/a
tan(22.6o) = a/12
tan(22.6o) = 12/a
Then the equation correctly uses the value of b to solve for a is
tan(22.6o) = a/12
Answer: dividing by 10000
Step-by-step explanation: because 10000 has 4 zeros
Answer:
B. x = -5 +/- √30.
Step-by-step explanation:
2x^2 + 20x = 10
2(x^2 + 10x) = 10
2[ (x + 5)^2 - 25 ] =10
2(x + 5)^2 - 50 = 10
2(x + 5)^2 = 60
(x + 5)^2 = 30
x + 5 = +/- √30
x = -5 +/- √30.
180 steel rods to be exact
