Tell whether each integer is prime, composite or neither

1. 5
2.8
3.13
4.18
5.73
6.36

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d

Yvaries directly as x. y =90 when x=6. find y when x=13