What is the range of y = log8 x?

a. all real numbers less than 0
b. all real numbers greater than 0
c. all real numbers not equal to 0
d. all real numbers

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Can some one me with these questions

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.