One of the angles of a right triangle is always 90 degrees. we have another 13.7 degrees angle. so we can find the other acute angle

the other acute angle measures 76.3
To calculate for the equivalent price in units of per square feet, we need to convert the given units from per square yard to per square feet. We calculate as follows:
<span>$11 per square yard ( 1 yard per 3 feet )^2 = $0.14 per square feet
90 square feet (</span>$0.14 per square feet) = $12.22
Answer:
Pi: Irrational
2/9: Rational
225: Rational
0.167: Irrational <--- fourth one
Step-by-step explanation:
Not sure about the 4th one, but the others are good :)