Answer:
$51.2
Step-by-step explanation:
We have been given that at the restaurant, the cost of the meal before tax was $40. The tax is 8.5%.
The cost after tax would be [tex]\$40+\frac{8.5}{100}\times \$40[/tex].
[tex]\$40+0.085\times \$40[/tex]
[tex]\$40+\$3.4[/tex]
[tex]\$43.4[/tex]
Sheri wants to leave at least an 18% tip. The cost of meal after tip would be [tex]\$43.4+\frac{18}{100}\times \$43.4[/tex].
[tex]\$43.4+0.18\times \$43.4[/tex]
[tex]\$43.4+\$7.812[/tex]
[tex]\$51.212\approx \$51.2[/tex]
Therefore, the total cost of the dinner would be $51.2.