A car salesman is paid a commission of $420 when he sold a used 2016 Acura RDX for $21000 during a certain month. What percentage of the sale did he receive as commission?

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?