2. Select the properties that both rectangles and parallelograms always share. 4 right angles
4 sides of equal length
2 pairs of parallel sides
2 pairs of sides with equal length
2 acute angles and 2 obtuse angles

3. Select the properties that equilateral triangles and isosceles triangles have in common.
0 sides of equal length
2 sides of equal length
3 sides of equal length
3 equal angles

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below.the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.