Answer:
13.1
Step-by-step explanation:
12/90=x/100%
cross multiply
1200%=90x
13 1/3%=x
When the car is moving, it has Kinetic Energy. As soon as the car entercount with the spring, its Kinetic Energy will transfer to Elastic Potential Energy.
<span>KE = EPE </span>
<span>1/2mv^2 = 1/2kx^2 </span>
<span>change the speed into m/s </span>
<span>50 km/hr = 13.9 m/s </span>
<span>1/2(1200)(13.9)^2 = 1/2k(2.2)^2 </span>
<span>now you do the math to solve for k.
k= 115926/2.42
K= 47903.30</span>
Answer:
523 to the nearest ten is 520
<span>Let x be the amount of hot dog and let y be the amount of water. So you will pay for it 1.50*x+0.80*y. Since you do not want to spend more than 20$, it should satisfy the inequality 1.50*x+0.80*y<=20.</span>
Answer:
60
Step-by-step explanation:
i did the math yeah
