Question 171798
I'll do the first two to get you started.


# 3


Percent Right = (Number he got right/total questions) * 100 = {{{((54-6)/54)*100=(48/54)*100=(8/9)*100=0.8889*100=88.89}}}



So he got 88.89% of the test questions right



------------------------------------------------


# 23


Note: 1 kilogram = 2.205 pounds (approximately)


So if you multiply 45 pounds by the fraction {{{(1kg)/(2.2lbs)}}} you get



{{{45*cross(lbs)*((1kg)/(2.205cross(lbs)))=(45kg)/2.205=20.408kg}}}



So 45 pounds is approximately 20.408 kilograms



So the answer rounded to the nearest tenth is 20.4 kilograms