Answer and Explain how to do both questions

a) Area of sector TRV =

b)

Step-by-step explanation:

a)

In , TW is diameter.

Therefore,

(Measure of central angle is equal to the measure of its corresponding arc)

Radius (r) = RW = 9 units

Area of sector TRV

Area of sector TRV

b)

Length of

Length of

step-by-step explanation:

i think you should think about the question and not look online.

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