What type of sequence is shown? 3, 6, 9, 12, 15
1, 3, 9, 27, 81

The first sequence has a common:
The second sequence has a common:

Which formula gives the area of a triangle? a=1/2(b+h)

The expression 20l+25g-10 calculates the number of dollars that the abc lawn company. how many dollars does the company make from raking 444 gardens and mowing 333 lawns

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).