you drive 200 miles in 3 hours before stopping for 30 mintues for lunch and gas. After lunch you travel 150 miles in an hour and a half. What was your average speed for the trip? A. 78 mph B. 67 mph C. 60 mph D. 70 mph​

Math it's appreciated. (picture provided)

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?

Need plz been trying to do it for a long time and still haven’t succeeded