NCr*P^r*q^(n-r)
7C4*. 75^4*. 25^(7-4)
35*. 75⁴*. 25³
35*. 316*. 016
11.06*. 016
. 1769
=. 177
The correct answer is d, i just graphed all four
The answer is b 14 , every 4 months, 200$ is saved if at 12 months he has saved 700$ we know that it will take another 2 months to save 100$ so its 14
We write the kinematics equations
a
vf = a * t + vo
rf = (1/2) * a * t ^ 2 + vo * t + ro
We have then
For the truck:
a = 0
vf = vo
rf = 45t
For the car:
a = 0
vf = vo
rf = 60 * (t-15)
Matching rf:
45t = 60 * (t-15)
Clearing t:
45t = 60t-900
60t-45t = 900
15t = 900
t = 900/15 = 60h
Answer:
it will take for the car to catch up with the truck 60h