Which statement below is true? a. all squares are rectangles because both are quadrilaterals, have 90 degree angles and the opposite sides are parallel. b. all trapezoids are rectangles because the opposite sides are parallel. c. all parallelograms are rhombus' because they have 4 congruent sides and the opposite sides are parallel. d. all rectangles are trapezoids because all the sides are parallel.

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

What is the lcm of 16 and 40 ? 24 and 40 ?

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size. it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?