Fred begins walking toward john house at 3 mi/h. john leaves his house at the same time and walks toward fred's house on the same path at a rate of 2 mi/h. how long will it be before they meet if the distance between the houses is 4 miles?

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

What describes horizontal cross section of the right rectangle 6m 8m 5m

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?