Хорошо, так что я собираюсь быть настоящим со всей отстойной жизнью! Какого хрена мы должны делать, помогите, пожалуйста (TRANSLATE IT)

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?