River otters 2 4 6 8 10 12 14 15
20 22 24 26 28 30 32 34 36 38 40 4
Weight (lbs)
Sea otters
3022 ***4 4 a so 52 54 56 58 62 646
Weight (lbs)
a) Identify the shape of each dot plot. (2 points: 1 point for each dot plot)

b

step-by-step explanation:

b

0.32

step-by-step explanation:

2.24/7

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places