What is the volume? 9 cm 8 cm 10 cm

A)260 cm3
B) 261 cm3
C) 262 cm3
D) 360 cm3 ​

4. find the geometric mean of 4 and 12. 24 8

What number should be added to both sides of the equation to complete this square? x^2-10x=7

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is