Bonus:
Give the vertex for the parabola with the equation f(x) = -3x² + 6x + 24

(1,27)

Step-by-step explanation:

Knowing the formula to find the vertex of a parabola as -b/2a=x

In the equation b=6 and a=-3

Thus, -(6)/2(-3)=1

Plug in 1 back to the equation

-3(1)^2+6(1)+24

= -3+6+24

=27

(1, 27)

Step-by-step explanation:

What I did was graphed it, and looked for the highest or lowest point. That point will be the vertex.

Hope this helps

hello,

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.

click to let others know, how is it

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step-by-step explanation: