Answer and step-by-step explanation:
Sylvia's expression is h+0.05h.
The variable h represents the cost of the hat.
0.05 represents the 5% sales tax; 5% = 5/100 = 0.05.
0.05h represents the amount of tax paid on the hat. To find a percent of a number, we multiply the decimal form of the percent by the original amount.
The total cost is given by h+0.05h.
Jin's expression is 1.05h.
The variable h represents the cost of the hat.
1.05 represents 100% of the cost of the hat plus the additional 5% tax; 100+5 = 105%; 105% = 105/100 = 1.05.
Together the total cost is given by 1.05h.