23 girls have a mean height of 153cm 17 boys have a mean height of 165cm

work out the mean of all 40 children?

plzz help me!!!
pleaseee

Write the percent as a fraction or mixed number in simplest form. 0.8%

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap

Consider the first four terms of the sequence below. what is the 8th term of this sequence?