21. a. Biology The table shows how the number of cricket chirps per minute changes with the air temperature.
40
50
60
70
80
90
Temperature (°F)
Chirps per minute
o
40
B0
120
160
200
Find the rates of change,
Harcourt Publishing Company Image Credit Card/
Shutterstock

b. f(x) = –√x + 3this is the correct answer

6 equilateral triangles

it is definatly the 3rd one. very much looks like it, for a good chance, the third one would be best for you.

8(4)^8=72^feet to say that the total can conclude to 8(4) which as you know would mean 8 x 4. that equals 32w. 32^ could make a 72 answer as well. but your coefficent will remain w so your answer is 72w.

you!

if you need more with your math, visit khan academy where we give videos and tutorials   on everything math. we are efficent in our work.

you,

from,

the khan academy team