Can you please tell me what the first question says? i can read it, its too dark
Answer:
D) (0.59, 3.35)
Step-by-step explanation:
The inequality for the thickness of the metal bars is:

In order for this inequality to be true, the following conditions must be met:

The range of thickness "x" that fits the inequality is:

Thickness ranges from 0.59 to 3.35 units.
Answer:
He multiplied the radius by 2 instead of squaring it
C i believe because 180 is the overall degree and 50+28=78 and 180-78=102
we use the interest formula. 4000*1.03^11=1.38423387*4000=5536.93548, or 5536.94.