Zack bought a cost for 69.78. he paid with $100 bill and received 26.73 in change. how much was the sales tax.

The tax was 3.49 dollars thats what i got hope it helps you man :)

Paid-cost-tax=change
minus change both sides and add tax to both sides
paid-cost-change=tax
100-69.78-26.73=tax
3.49=tax
the tax was $3.49 or abut 5%

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.