A boy gets #2.00 per week as pocket money. His sisters gets only #1.60 per week. Find the ratio of the boy's allowance to his sister's. If his sister gets 20k more per week, what will be the new ratio

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

Select the correct answer from each drop-down menu the equation of a line is 3/5*+1/3y=1/15

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.