For which intervals is the function positive?
(4,8]
(-6,-2)
(-2,4)
[-8,-6)

(-2,4)

Step-by-step explanation:

A positive function means that the slope or rather the gradient of the graph at that point is positive.

The negative gradient always slides from right to left. i.e the intervals for which the function is negative are; between x = -8 and x = -4 and between x = 0 and x = 8.

The function is positive when the slope slides from left to right. From the graph that it is between x = -4 and x = 0.

From the choices the function is positive at,  (-2,4)

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answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,