How would you do this problem?

Mathematics

2 answers:

Vlad1618 [11]3 years ago

6 0

Answer:

6 seconds

Step-by-step explanation:

First: equalize the equation to zero

f(t) = -5t² + 20t + 60

-5t² + 20t + 60 = 0

Second: find its roots

-5(t² - 4t - 12) = 0

-5 (t - 6)(t + 2) = 0

$t - 6 = 0 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: t + 2 = 0 \\ t = 6 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: t = - 2$

Time can't be negative so the answer is: it takes 6 seconds to hit the ground

sweet [91]3 years ago

3 0

F(x)=-5t^2+20t+60
Divide everything by -5
f(x)=t^2-4t-12
(t-6)(t+2)
Set it up to zero
t-6=0. t+2=0
t=6. t=-2
Since you can’t have negative seconds, the answer is 6 seconds

You might be interested in

the probability density for a particle in a box is an oscillatory function even for very large energies. Explain how the classic

77julia77 [94]

Answer:

This is achieved for the specific case when high quantum number with low resolution is present.

Step-by-step explanation:

In Quantum Mechanics, the probability density defines the region in which the likelihood of finding the particle is most.

Now for the particle in the box, the probability density is also dependent on resolution as well so for large quantum number with small resolution, the oscillations will be densely packed and thus indicating in the formation of a constant probability density throughout similar to that of classical approach.

8 0

3 years ago

The function y=6+1.25x can be used to find the cost of joining an online music club and buying x songs from the website. Based o

Butoxors [25]

The y-intercept is obtained when we equate x to 0, where x is the number of songs bought. Thus, before buying any songs, $6 have to be paid. This is the cost of joining the the music club. The second statement is true.

7 0

3 years ago

Find the distance between the two points in simplest radical form.<br> (-9,8) and (-3, -1)

dmitriy555 [2]

Answer:

The distance between (-9, 8) and (-3, -1) will be:

$\:d=3\sqrt{13}$ units