Ngoc invests a total of $14,000 in two accounts paying 3% and 7% simple interest, respectively. How much was invested in each account if, after one year, the total interest was $620.00.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)