A bag contains 4 blue marbles and 3 red marbles. What is the probability of picking a blue marble, putting it back in the bag, then picking a red marble?

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

Ngrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. she divides the trail mix into 12 equal portions. each portion weighs 0.7 pound. how many pounds of raisins did she use to make the trail mix? express the answer to the nearest tenth.

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?