The number of calories burned while jogging varies directly with the number of minutes spent jogging. If George burns 150 cal by jogging for 20 minutes, how many calories does he burn by jogging for 30 minutes?

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?

Which value of y will make the inequality y< -1 false?

Percent increase and decrease. original number: 45 new number: 18