100 POINTS plz help Chuck drops a rock from a height of 70 m. How long will it take the rock to hit the ground?
2 answers:
Answer:
3.8 seconds
Step-by-step explanation:
h(t) = −4.9t² + v0t + h0,
0 = -4.9t² + 70
4.9t² = 70
t² = 100/7
t = 3.77964473
Answer:
3.8
Step-by-step explanation:
We are going to plug in the values of the equation, so h(t)=-4.9^2+v0t+h0 will
now be h(t)=-4.9^2+0+70
Now we will find the a b and c of the equation, a=-4.9 b=0 c=70
Now we must find the discriminant of the equation, which the equation for that is D=b^2+(-4)(a)(c)
So D=1,372
Now we use the quadratic formula (see picture below for finished product)
You might be interested in
Answer:
a=1
b=81
c=9
Step-by-step explanation:
Answer:
1. a =3(2a) +5 and a= 6a+5
2. 47=3(2times 7) +5 and 47 =6 time 7 plus 5
Step-by-step explanation:
Answer:
What is the question???
Step-by-step explanation:
Answer:
C.97
Step-by-step explanation:
Answer:
Answer: D. 18
Step-by-step explanation: