The equation you use in this question is cos.
Length w is the adjacent part of the triangle.
Length w = cos(angle) x hypotenuse
Length w = cos(52) x 28
Length w = 17.24 (rounded to 2 d.p)
ANSWER :
about a 1.076% increase
EXPLANATION :
1. Set up your equation
13/100 = 14/x
2. Cross multiply
13x = 1400
3. Divide by thirteen on both sides
x = 107.692307
4. Transform it into percent [ divide by a hundred ]
1.076
The answer is D.
This is because all of the equations are equivalent to __ x 9, because you have to solve the brackets (which are all the same) first.
12(0.59)= 7.08
10-7.08= 2.92
Sofia will get $2.92 in change.
Hope this helps!