The altitude above sea level of an airplane just after taking off from an airport on a high plateau is given by the linear function h(t) = 400t + 2300, where h(t) is in feet and t is the time in minutes since take-off. Find the altitude after 8 minutes.
Group of answer choices

5500 feet

3200 feet

5400 feet

5600 feet

2500

step-by-step explanation:

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation:

try soting them out first

step-by-step explanation: