Gavin says that 81 can only be shown as a power with a base of 9. Hayley says that 81 can be shown as a power with a base of 3 or 9. Who is correct? Show how you know.

Hayley is correct.

Step-by-step explanation:

81 can have a base of 9, as 9*9 = 81. However, it can also have a base of 3, as 3*3*3*3 = 81. 81 can be shown as a power with a base of 3 or 9.

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex