So the interval for the solution of a certain set is the numbers that can be used as value for X in the set and the set still be true, in order to solve this, you just need to solve the set by making it an equation:
0.35x – 4.8 < 5.2 – 0.9x
0.35x – 4.8 =5.2 – 0.9x
0.35x+0.9x=5.2+4.8
1.25x=10
x=8
So the maximum value of X will be 8, and when X is a negative value the set is true, so the interval would be all real numbers form -infinite to 8.
The amount after time t will be given by simple interest formula given by: A=prt/100 where: principle,p=$175 rate, r=3.5% time, t=5 years thus the rate earned after 5 years will be: A=(175*3.5/100*5) A=$30.625 Answer: B] 30.65
