Katie invested a total of $7000, part at 4% simple interest and part 5% simple interest. At the end of 1 year, the investments had earned $321 interest. How much was invested at each rate?

How can you find the conditional probability of a given b as the fraction of b’s outcomes that also belong to a, and interpret the answer in terms of the model? i just need a good explanation

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.