Question

bad math question of the night
how many mistakes can you find?
A ball is thrown upward from the top of a building. The function below shows the height of the ball above the ground, f(t), in feet, at different times (t) in seconds: \(f(t) = -16t2 + 32t + 90\) The average rate of change of f(x) from x = 4 to x = 6 is

Answer 1

i got at least two
three if you are being picky

Answer 2

still thinking.... i got only one (your picky one i guess :) ) : \(t2\) should be \(t^2\)

Answer 3

no that was just how the question was written when i copied and pasted it

Answer 4

I found just one, too. the variables t and x

Answer 5

second one : f(t) and f(x).... the teacher must be sleeping when cooking up this question lol

Answer 6

that is one mistake
yes

Answer 7

try and solve it!

Answer 8

-90 instead of 90, right?

Answer 9

wait
if it is thrown upward.... how high is it? :p

Answer 10

(im the teacher)

Answer 11

(the sleeping one)

Answer 12

hahahaa.........

Answer 13

No I think it's +90

Answer 14

+90 is fine for the starting height, but the ball must have reached the ground before 4 seconds... so we're getting negative height... (perhaps the ball is sinking down.. ?)

Answer 15

yes. I agree @iambatman my bad. it's upward

Answer 16

exactly
ball hits the ground before 4 seconds
the correct answer would be zero

Answer 17

I don't see the question. Where is it?

Answer 18

it asks to find the average change of f(t)?

Answer 19

The average rate of change of f(x) from x = 4 to x = 6 is

Answer 20

I maybe tempted to say the teacher purposefully wants \(\dfrac{-294 - -38}{6-4}\) if there are no other mistakes in the question... given the other mistakes in phrasing this problem, clearly its a carelessness from teacher side lol