Answer:
30 km/h car
Step-by-step explanation:
From analysis the car traveling at 30 km/h has greater kinetic energy
we can deduce it from the expression of kinetic energy which is
![KE=\frac{1}{2} mv^2](https://tex.z-dn.net/?f=KE%3D%5Cfrac%7B1%7D%7B2%7D%20mv%5E2)
Assuming the mass m= 1 kg
For the 30 km/h
![KE=\frac{1}{2}*1*30^2 \\\\KE=\frac{1}{2}*1*900\\\\\KE=450 J](https://tex.z-dn.net/?f=KE%3D%5Cfrac%7B1%7D%7B2%7D%2A1%2A30%5E2%20%5C%5C%5C%5CKE%3D%5Cfrac%7B1%7D%7B2%7D%2A1%2A900%5C%5C%5C%5C%5CKE%3D450%20J)
For the 15 km/h
![KE=\frac{1}{2}*2*15^2 \\\\ KE=\frac{1}{2}*2*225 \\\\\ KE=\frac{1}{2}*450 J\\\\\ KE=225 J](https://tex.z-dn.net/?f=KE%3D%5Cfrac%7B1%7D%7B2%7D%2A2%2A15%5E2%20%5C%5C%5C%5C%20KE%3D%5Cfrac%7B1%7D%7B2%7D%2A2%2A225%20%5C%5C%5C%5C%5C%20KE%3D%5Cfrac%7B1%7D%7B2%7D%2A450%20J%5C%5C%5C%5C%5C%20KE%3D225%20J)
Though the kinetic energy is a function of mass and velocity, but from our analysis the faster moving object has more KE
Well, $48.76 divided by 3 = 16.25333333333333
So, each student will get $16.25 with a penny left over.
Total = Principal × ( 1 + Rate ) ^ years
(Solved by taking logarithms)
Years = log (total / principal) / (log (1 + rate))
Years = log (684 / 600) / (log 1.07)
Years = log (1.14) / (log (1.07)
Years = 0.0569048513364726 / 0.0293837776852097
Years = 1.9366077414
Answer: 42.6668mm and 42.673mm
Step-by-step explanation:
Answer:
c.
Hope this helps!
Sorry if its the wrong answer. =(