The ratio of the number of beads karen had to the number of beads patricia had was 2: 5 .after patricia bought another 75 beads, the ratio became 4: 15.how many beads did each girl have at first?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Which of the following tables represents exponential functions?

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed