Dawn lingua bought three yards of cloth to make some curtains. the cloth was on sale for $2.25 per yard. how much did dawn pay for the cloth if the sales tax was 5%?
a) $2.36
b) $7.25
c) $8.07
d) $7.09

So we want to see how much did Dawn pay for the three yards of cloth if one yard is 2.25$ and the sales tax is 5%. So the sales tax increases the value in this case for 5% so the new value is 105% or 105/100. Now we see what the value of one yard of cloth is and that is (105/100)*2.25$=2.3625$. So 3 jards of cloth are 3*2.3625$=7.0875$ so the correct answer is D.