WILL GIVE BRAINLIEST! NEED ANSWER FAST! Use the markup equation S = C + rC, where S is the selling price, C is the cost, and r is the markup rate.

A car navigation system costing $370 is sold for $447. Find the markup rate. Round to the nearest tenth of a percent.
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The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.

Can someone me immediately, this is due by midnight! if you can't see the question, i'll text it to you. show the steps you took to get your answer.