My cookbook says that a salad sauce should be made of 1/3 lemon juice and 2/3 oil. I put 30 ml of oil but my hand slipped when adding the lemon juice and the total volume is now 70. How much oil must I now add to have the correct proportions?

Using d, e, and f as values on a triangle and d being 60 degrees, what is the value of e and f if d is 60 degrees? also, what do you notice about the values of e and f?

How to simply and write the answer n a whole number

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?