$28 dinner and 15% tip

$32.20 for the total bill & $4.20 for a 15% tip.

Step-by-step explanation: To find a 15% tip on a $28 dinner, all you have to do is simply multiply $28 by 15%. First, convert 15% to a decimal. 15 divided by 10 = 0.15.

Next, multiply 28 x 0.15 to find the tip. 28 x 0.15 = 4.20

So a 15% tip on a $28 dinner is $4.20

To find the total of the bill add $4.20 to $28, which gives you a total bill of $32.20.

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q

i want the details r