Question

Alg help?
https://prnt.sc/j3kcb5
hints for it: https://prnt.sc/j3kcd6

Answer 1

What do you think?

Answer 2

b & d?

Answer 3

Those two contradict each other.

Answer 4

c & d?

Answer 5

Do you know where the vertex is?

Answer 6

100?

Answer 7

You're halfway there, it's at (10, 100). So when the length of the rectangle is 10, the area of the rectangle is 100. That means the maximum area of the rectangle is 100, since that's the vertex of this parabola. Recall the hints, when a quadratic function is facing down, the highest point is the vertex. Then the min/max value is the vertex. When it opens down like this, the vertex is the maximum.

Answer 8

That eliminates the first two, and leaves the last two. It's true that the max area is 100ft, and that the area of the rectangle is either equal to 100ft, or less.

Answer 9

so it C & D?

Answer 10

Correct. Just wanted to make sure you know why they are the correct answers, as it seemed like you were guessing.

Answer 11

thank you

Answer 12

No problem