Daria Krymkowska 
Maths and Physics University student teaching Maths, Physics and Chemistry up to A-level
278Students
helped
2Questions
answered
£15Per
hour
Maths
Asked by Sophia · 3 months ago
Edin has £300 in his savings account. His bank offers him a fixed 5% simple interest rate per annum, for a period of 3 years. How much interest will he have earned after 3 years?
Interest in one year = 5/100 * £300 = £15 Interest in 3 years = £15 * 3 = £45
Physics
Asked by Eva · 4 months ago
A Diesel engine is supplied with 6000j of chemical energy and usefully transfers 2100j what is the efficiency?
efficiency = useful power out/total power in 2100/6000=0.35 could also be written as a percentage so 0.35=35%
Daria Krymkowska
Maths and Physics University student teaching Maths, Physics and Chemistry up to A-level
278Students
helped
2Questions
answered
£15Per
hour