Tonya dog- walking service charges a flat rate of $20 per month, plus $3 per mile that each dog is walked. beth does not charge a monthly fee for her dog- walking service , but she charges $5 per mile that each dog is walked. find the miles for which tonya and beth will charge the same amount.

Given that Tonya charges 20$ monthly fee and 3$ per mile of her dog-walking service.

And Beth does not charge any monthly fee but charges 5$ per mile of the dog walked in.

Let x be the number of miles dog has walked in a month.

The amount Tonya will charge on x miles = fixed monthly fee + number of miles * charge per mile = 20+3x

And the amount Beth will charge on x miles = 0+ 5*x = 5x.

We are asked to find the x-value for which Beth chargeable amount = Tonya chargeable amount

That is 5x = 20+3x

            5x-2x = 20

              2x=20

                x=

Hence number of miles for which Tonya and Beth will charge the same amount is 10.

answer: ratio of volume of cone (with 3 times the height and equal diameter) to volume of cylinder is 2 to 1. the value of π is not used.

step-by-step explanation:

radius is diameter/2 = 4.

area of circle is π r^2.

volume of cylinder is height × area of base = hπr^2 = 3(4^2) π = 48π cubic inches.

not knowing the formula for volume of cone, i calculate it using calculus (which is for calculating things).

volume of cone is integral 0 to h area(y) dy. area(y) is π r(y)^2. r(y) runs r to zero as y runs zero to h, r(0) = r, r(h) = 0.

r(y) = r - r/h y

area(y) = π (r - r/h y)^2 = π (r^2 - 2r^2y/h + r^2y^2/h^2) = π r^2(1-2y/h+y^2/h^2)

antiderivative area(y) = π r^2 (y-y^2/h+y^3/(3h^2))

integral 0 to h = π r^2(h-h^2/h+h^3/(3h^2) - (0)) = π r^2(h - h + h/3) = π r^2(h/3) = π/3 r^2 h

volume of this cone is π/3(4^2)18 cubic inches.

= 6 16 π = 96π cubic inches.

cone has twice the volume, 96/48.

cone height is 6 times the cylinder.

ratio of volume formula: π r^2 cancels.

cone over cylinder ratio is 6h/3 to h, 2 to 1.