PLEASE HELP ME ASAP! BRAINLIEST TO THE CORRECT ANSWERS. 1) In a sale, all prices are reduced by 30%. If the sale price of a washing machine is $245, what was the original price??

2) Prices in a shop are all increased by 5%. A shirt now costs $63. What was the original price??

3) A bank account gives 3% compound interest on savings. Eric invests $500. How long will he have to invest it before he has over $1700 in the account???

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?