Can someone explain to me how to set up abd use a sign chart in calc? Like for example, if I have the derivative of something and i need to know where its positive or negative, or if i need to know if its increasing or decreasing. Or if i need to know what intervals its moving tp the right and in and which ones is it moving to the left in?

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

x=6 and x=3

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she will travel a distance in the range of 3 - 11 miles