Which of these situations can be represented by the opposite of 10?
you climb up 10 flights of stairs
you walk down 10 flights of stairs
the temperature rises 10°f
a plant grows 10 inches taller
choose the correct answer below
o a. you climb up 10 flights of stairs.
ob. you walk down 10 flights of stairs.
oc. the temperature rises 10°f.
od. a plant grows 10 inches taller.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?