Answer: B. 9.8%
Step-by-step explanation:
Hi, to answer this question we have to use proportions
since 23.5 is the 100% = 23.5 inches /100 %
For 21.2 inches =21.2inches /x%
23.5/100 =21.2/x
Solving for x:
x = 21.2 / (23.5/100)
x = 90.2%
21.1 inches are 90.2% of 23.5 inches.
So, the percent decrease is:
100% - 90.21 % = 9.8 %
Feel free to ask for more if needed or if you did not understand something.
Answer:
? = 57
Since this is a right triangle, we can use trig functions
cos ? = adj/ hyp
cos ? = 14/26
Taking the inverse cos of each side
cos ^-1 ( cos ?) = cos ^-1 ( 14/26)
? = 57.42102961
To the nearest degree