The gateway arch in st. louis can be modeled by y=-2/315(x+315)(x+315) where x and y are measured in feet. the x-axis represents the ground. find the width of the arch at ground level

width= __ feet

How tall is the arch?

height= __ feet

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

figure c

step-by-step explanation:

hope this .

c

step-by-step explanation:

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