Answer:
The answer is option D.
Step-by-step explanation:

Hope this helps you
Answer:
The answer is A and D.
Step-by-step explanation:
Acute angles are angles that are less than 90°.
0° < θ < 90°.
So by looking at the diagram, any angles that are smaller than a L-shaped(90°) are all acute angle.
Answer:
100%+15% = 115%
proportionally:
x - 100%
161 - 115%
x = (161 * 100%) / 115% = 140
f(x)=2x+2
f(4)=2(4)+2
Do the parenthesis first because of using PEMDAS
P=parenthesis
E= exponents
M= multiplication
D=division
A= addition
S=subtraction
2(4)=8
8+2=10
Answer: f(4)=10