Which expression represents the total surface area, in square meters, of the rectangular pyramid below?

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle