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Step-by-step explanation:
1.
Choosing the product of power property,when you multiply exponentials with the same base , you add their exponents.
This is represented as :

This property is true in that ;
where you have x³ × x³ , x³ is x*x*x and the other x³ is x*x*x .Adding the xs will give x⁶ which is similar to 3+3=6 xs
A numerical example could be;

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Properties of exponential functions :brainly.com/question/8742222
Keywords : properties, exponents, numerical expression
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Decompose each velocity in its i and j - coordinates.
1) River's velocity
3.5 m/s, west fo east = 3.5i + 0j
2) Luke's velocity
5m/s, 60° east of north
5* sin(60°) i + 5*cos(60°) j = 4.33 i + 2.5 j
3) Resultant velocity
[3.5i + 0j] + [4.33i + 2.5j] = 7.83i + 2.5j
resultant speed = √[ (7.83)^2 + (2.5)^2 ] = 8.22 m/s
angle = arctan(2.5 / 7.83) = 17.7° north of east (equal to 72.3° east of north).
Step 1) Find the area of the trapezoid:

Step 2) Find the answer:

So the answer is
56