An object falls from a height of 400 feet. its height, h, in feet is given by the equation where t is the time in seconds the object has fallen. how many seconds will it take for the object to reach the ground?

Option B is correct, i.e. t = 5 seconds.

Step-by-step explanation:

Given the equation of height of object is h = -16t² + 400.

When it touches the ground, the height of object would be ZERO.

So the equation becomes:-

0 = -16t² + 400.

16t² = 400

t² = 400/16

t² = 25

t = √25

t = ±5

Since, t is the time and time can not be negative value.

Hence, option B is correct, i.e. t = 5 seconds.

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: