The last time david filled up his truck with gas, he paid $27.44 for 7 gallons. this time, he needs 15 gallons. if the price is the same, how much will he pay?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Math question.. plz me .. best answer all

The area of a circle is equal to 1 dm². find the radius of the circle.