The original price of a bike is $340. The store offers a discount of 20% off the original price. A customer has a coupon for an additional 10% off, which will be applied after the store discount.
What is the final cost of the bike?
What is the real answer

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Carmen ayer en el mercado compro 3/4 kg de guayabas, 6/8 kg de peras, 1/2 kg de naranjas ¿cuantos kilogramos de fruta compro?