É uma questão relativamente simples, o problema é cair em uma pegadinha do enunciado.
Se colocarmos que o jarro inicialmente tenha X ml, após Claudete beber 240 ml temos que X-240=Y. Então Claudete bebe 1/4 da jarra, por isso temos 3*Y/4=Z (Se ela bebeu 1/4, reataram 3/4). Depois, ela bebe 1/3 do volume inicial e o suco acaba, logo montamos a equação X/3=Z.
Agora temos um sistema com estas 3 equações:
--> X-240=Y
-->3Y/4=Z
-->Z=X/3
Juntando as 2 ultimas vc terá: X/3=3Y/4. E como Y=X-240.
X/3=3*(X-240)/4
Se resolver isto terá que X=432. logo a resposta é 'E'
Answer:
Step-by-step explanation:
Given that for X the amount of credit card debt for U.S. adults under 35, is
having mean as 8724 dollars.
For this point estimate to be unbiased and most accurate we must ensure that
i) The sample represents the population
ii) Samples are drawn at random
iii) Sample sizes are sufficienly large.
Hence we see that C is not right as college students cannot represent the entire population. Tv poll cannot be said to be random since there may be a significant population who was not aware about this poll. A and B are right but B is better with more sample size.
Answer:
7280g
Step-by-step explanation:
simple: each day - 0.52kg
so, 2 weeks = 14 days, 14*0.52
= 7.28kg of flour in those 2 weeks or 7280g of flour in 2 weeks
(y, -x) is the answer... sorry i was being lazy before and didnt want to write it out...