Anyone? help? please?

Area of the remaining board = 403 cm²

Step-by-step explanation:

Area of the remaining paper board = Area of the rectangle - Area of the semicircle

Area of the rectangle = Length × Width

                                    = 28 × 20

                                    = 560 cm²

Area of the semicircle =

                                     =

                                     = 3.14 × 50

                                     = 157 cm²

Area of the remaining board = 560 - 157

                                                = 403 cm²

students group

step-by-step explanation:

a person who   joins a party or a seminar can explain his feelings about that particular occasion better more than anyone else.

as bella managed a show for the students in the school and invited students to watch that show

hence

students group will be the best group to survey to find this information

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus