roads are often designed with parabolic surfaces to allow rain to drain off. A particular road that is 32 feet wide is 0.4 foot in the center than it is on the sides. Find an equation of the parabola with its vertex at the origin that models the road surface.

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

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step-by-step explanation: