Write an equation of the parabola in intercept form  that  passes through 
(−18,  72)  with  x-intercepts of  −16 and  −2.

an equation of the parabola is  y=

Equation of parabola is

Equation of parabola in intercept form that passes through with intercept of is given as follows:

So,

Divide both sides of this equation by

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y=9/4(x+16)(x+2)

Step-by-step explanation:

y=a(x-r)(x-s)

-16 & -2

y=a(x-(-16))(x-(-2))

y=a(x+16)(x+2)

Now we need to find a by plugging (-18, 72) into the equation.

72=a(-18+16)(-18+2)

72=a(-2)(-16)

72=a(32)

a=72/32

a=9/4

Finally, we get y=9/4(x+16)(x+2).

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;