ABCD and PQRS are similar find the length x of QR

Which statements are true? see picture

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?