The simple interest formula i=prt gives the interest earned on an investment of p dollars at interest rate r for a time of t years. how much does leroy need to invest at a rate of 7% in order to earn $420 interest in 4 years?

$150

$2,400

$240

$1,500

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities