An item that cost $50 is marked 20% off. sales tax for the item is 8%. what is the final price including tax? solve the problem with the discount applied before the sales tax. solve the problem with the discount applied after the sales tax.

  $43.20

Step-by-step explanation:

The price with tax is 100% + 8% = 1.08 times the price before tax. The discount multplies that price by 100% -20% = 0.80. The discount multiplier is the same whether the discount is applied before or after the tax.

The combined effect of the two multipliers is ...

... 1.08 × 0.80 = 0.864

so the discounted price with tax added is 0.864 × $50 = $43.20

Perhaps you're supposed to figure the tax (8% of $50 = $4), add the tax ($50 +4 = $54), then subtract the discount (20% of $54 = $10.80) to get

  $54.00 -10.80 = $43.20

(a) the volume of the cone is 20/3 in3

hence, option a is correct.