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[tex]\huge \bf༆ Answer ༄[/tex]

Sales tax on the item is ~

[tex] { \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \$23.40[/tex]

Cost of the item is ~

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \$390[/tex]

sale tax rate is ~

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \: \dfrac{ \$23.40}{ \$390} \times 100[/tex]

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \: 0.06 \times 100[/tex]

[tex]{ \qquad{ \sf{ \dashrightarrow}}}  \:  \: \sf \: 6 \%[/tex]

Therefore, the sales tax rate is 6 %

The sales tax rate is 6%.

What is sales tax?

Sales tax is a compulsory sum levied on the sales of certain goods and services. Sales tax increases the price of goods and services.

What is the sales tax rate?

Sales tax rate = (sales tax / total cos of of the item) x 100

($23.40 / $390) x 100 = 6%

To learn more about taxes, please check: https://brainly.com/question/25311567