($−at^2+bt+c$)

math problem need help!

Two lines parallel to the same plane are parallel to eachother

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest