Which of the following numbers is not a prime number? A) 13
B) 17
C) 18
D) 19
E) 23

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain