Which of the following is the solution set of –4 < 3t + 5 ≤ 20?
a)
{t | t < –3}
b)
{t | t < –3 or t ≥ 5}
c)
{t | –3 < t ≤ 5}
d)
{t | t < –3 and t ≤ 5}

c is the answer

Step-by-step explanation:

all work is shown and pictured

For this case we must indicate the solution of the following inequality:

Subtracting 5 on all three sides we have:

DIvid between 3 on all three sides we have:

Thus, the solution is given by:

Option C

a. she will receive a refund of $278.

step-by-step explanation: