In the calm waters of an inlet, Manon's boat moves with a velocity (speed and direction) vector \vec{b_1} = (3,4) b 1 =(3,4)b, start subscript, 1, end subscript, with, vector, on top, equals, left parenthesis, 3, comma, 4, right parenthesis. Once it enters the main river channel, however, Manon observes that it is now moving with a velocity vector \vec{b_2} = (1,1) b 2 =(1,1)b, start subscript, 2, end subscript, with, vector, on top, equals, left parenthesis, 1, comma, 1, right parenthesis.

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

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation:

step-by-step explanation:

for volume, add base x height x width