Which explanation best describes how to solve this problem?

marcia covered her kitchen floor with twice as much tile as her bathroom floor. she tiled 15 square feet of her bathroom floor. she also tiled a 9-square-foot area by her front door.

how many square feet of her house did marcia tile altogether?

a.
divide 15 by 2. then add 9 and 15 to the quotient.

b.
add 15 and 9 and multiply the sum by 2.

c.
multiply 15 × 2. then add 15 and 9 to the product.

d.
subtract 9 from 15. then multiply the difference by 2.

The answer is C because 15x2 represents the kitchen floor. Adding 15 and 9 represents the bathroom and the area by her front door. It would total to 54 square feet which is C.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )