13] A guest on a talk show tends to receive many phone calls right after she is on the show, and then the calls become more frequent
. This can be represented by the equation y= 30/1,02), where yis the number of phone calls after d days.
How many phone calls should she expect after 10 days
?

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).

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints