Pls me on this question

15. the shaded region represents the space used for a pool in ms. perez's (1 point)
backyard. her backyard is 10 units long and 10 units wide.

[picture attached]

what is the area of the space that is not used for the pool?
16 square units
40 square units
64 square units
84 square units

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

One integer is 5 more than another. their product is 104. find the integers

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.