What is the area of the parallelogram? Measurements:
21 cm 15 cm 20cm

Answer choices:
82cm2 30cm2 315cm2 420cm2​

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of