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madam [21]
3 years ago
14

How many radius make a complete circle​

Mathematics
1 answer:
user100 [1]3 years ago
4 0

Answer:

Step-by-step explanation:

It takes 2 π 2\pi 2π radians (a little more than 6 radians) to make a complete turn about the center of a circle. This makes sense, because the full circumference of a circle is 2 π r 2\pi r 2πr , or 2 π 2\pi 2π radius lengths.

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Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/h back downstream to her starting point. If her total r
Masja [62]

Answer:

about 26 min

Step-by-step explanation:

Toni rows a boat 4.5 km/h upstream and then turns around and rows 5.5 km/h back downstream to her starting point

First we find the average speed

We add both speed and divide it by 2

\frac{4.5+5.5}{2} = 5

Now we find the distance for round trip

given total time is 48 mins. convert mins into hours

48 mins = 48 divide by 60 = 0.8

average speed = 5 km/hr

Distance = speed * time = 5 * 0.8 = 4 km

distance covered both ways = 4 km

so 4 divide by 2 = 2 km each way

To find time taken for upstream = distance of each way / speed of upstream

time = \frac{2}{4.5} = 0.44 hours

Now convert hours into minutes

0.44* 60= 26.4 minutes





3 0
2 years ago
You need
Reil [10]

Answer:

79.8

Step-by-step explanation:

math

3 0
3 years ago
Please help me with this and thank you
castortr0y [4]

Answer:

the correct answer is C. 45

Step-by-step explanation:

so 1/5 means there are 5 peice to make a whole...

so if you cut an apple into 5 parts, each slice of that apple is 1/5

so if you cut 9 apples into 5 slices its just multiplication...

5*9=45

**for my visual learners** in the parenthesis are groups of 5 sticks

( ///// ) **those are your apple slices** **now just do that exactly 9 times**

( ///// ) ( ///// ) ( ///// ) ( ///// ) ( ///// ) ( ///// ) ( ///// ) ( ///// ) ( ///// )

   5       10      15       20      25       30      35      40      45

i really hope this helps <3

8 0
3 years ago
Write an algebraic expression: 4 groups of y.
Dvinal [7]
4y is your answer because ffor is the mathmatical term for multiplying in any word problem. 
8 0
2 years ago
Read 2 more answers
Graph the function g(x) = 4x–7.
lukranit [14]

Answer:

two dots: (0, -7), (1, -3)

and it's the line

Step-by-step explanation:

just try x=0, g(x)=-7

and x=1, g(x)=-3

5 0
2 years ago
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