Answer:
7hrs-280km
Step-by-step explanation:
If 4hrs-160km then...
Divide 160 by 4 and you get 40
Then multiply 7 by 40
You get 280!!
Thats the answer!!
The radius of the sector of the circle with the given area is: B. 3.
<h3>What is the Area of a Sector?</h3>
Area of sector of a circle = ∅/360 × πr².
Given the following:
Area of sector = 9/8 π cm².
∅ = 45 degrees
Plug in the values into the formula
9/8π = 45/360 × πr²
1.125 = 0.125 × r²
1.125/0.125 = r²
9 = r²
r = 3 cm
Learn more about the area of sector on:
brainly.com/question/22972014
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Answer:
s_5=8404
Step-by-step explanation:
This is a geometric series so we can use the formula
S_5=2500-2500*.8^5/1-.8
s_5=2500-2500*.32/.2
s_5=2500-819.2/.2
s_5=1680.8/.2
s_5=8404
20 minutes* (1 hour/ 60 minutes)* (90 km/ 1 hour)= 30 km.
(Note that the units cancel out so you get the answer)
Final answer: 30 km~
