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3 years ago

12

The radius of a bicycle wheel is 80cm. During one trip this wheel rotted 25121 times. To the nearest metre, how far did the bicy

cle travel on this trip? Express your answer in kilometres.

1 answer:

azamat3 years ago

3 0

Answer: someone plz help

Step-by-step explanation:

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WILL GIVE 20 points PLEASE ANSWER ITS URGENT

babunello [35]

The answer for the first blank would be 1/2 because it had been dilated down to half it's original size. I hope this helps!

8 0

3 years ago

Really need help on question 8.

Diano4ka-milaya [45]

Answer:50.18

Step-by-step explanation:

8x+17+9x+11=102

17x+28=102

-28. -28

17x=74

<CAD=9x+11=50.18

x=74/17

5 0

3 years ago

Please help asap 25 points

Dafna11 [192]

Answer: (c) y<=-x+4

The area is shaded UNDER the boundary line, hence "<"

The boundary is plotted as solid line, hence "="

7 0

3 years ago

The ratio of the Areas of the bases of these cones is 9 to 4.

Lapatulllka [165]

Answer:

Step-by-step explanation:

This is something you learn in Geometry. Gotta love Geometry and all of its hundreds of rules for triangles and circles and all that good stuff!!

The rule for similar figures is

ratio of perimeter (one-to-one)-->area (square the one-to-one)-->volume (cube the one-to-one).

We are given area. You CANNOT CUBE THE AREA MEASURES TO GET TO THE VOLUME!! You have to find the one-to-one first and then go forward from there.

If the area is the one-to-one squared, then

$\frac{\sqrt{9} }{\sqrt{4} }=\frac{3}{2}$

The one-to-one is 3:2. To get to the volume now, cube those one-to-one values:

$\frac{3^3}{2^3}=\frac{27}{8}$

7 0

3 years ago

The radius of one sphere is twice as great as the radius of a second sphere. Find the ratio of their volumes.

Juliette [100K]

The ratio of the radii is 2:1, so the ratio of their surface areas is 4:1. <span>The area of a sphere is defined by 4 * pi * r^2 </span>

<span>So if the radius of the first sphere is 2r, then it would be (2r)^2 = 4r^2 </span>

<span>The rest is the same. So the ratio of their surface areas would be </span>

<span>4 * pi * 4r^2 divided by </span>
<span>4 * pi * r^2 </span>

<span>or 4.</span>

7 0

3 years ago