A car is accelerated from 45 km/H to 65 km/h in 30 min. Find the acceleration of the car and the distance covered.

acceleration=40m/s² and distance is 27.5m

Step by step explanation:

(a)acceleration is given by:

a=v-u/t

v=65km/h,u=45km/h, t=30min which is ½hour

therefore a=65-45/½

a=40

the distance is given by:

S=ut+½at²

S=(45•½)+½(40)(½)²

S=27.5m

step-by-step explanation:

just plug in each number for x and see which ones work and don't

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500