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3 years ago

Please help!!! I really don’t get this only I get where the 3 are but please help me for the 4/5 and -0.4!

Mathematics

1 answer:

Naily [24]3 years ago

8 0

Answer:

-0.4 should be in between 0 and -0.5, however be as close to -0.5 as possible while not being ON -0.5.

3 4/5 should be in between 3 and 4, so you can split 4/5 into 8/10 which are equal to each other. Then you can pretend to split the 3 and 4 gap into 10 equal pieces. After you split the gap, count 8 parts to the left of 3.

Step-by-step explanation:

I hope you understand what I mean.

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At an outdoor party location, the tables seat 12 guests each. The party host invited 163 people and 9 people responded that they

Reil [10]

Answer:B

Step-by-step explanation:

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3 years ago

If a rectangle is rotated about the y-axis as shown below, what three-dimensional figure would be formed?

Xelga [282]

Answer:

Cylinder. The explanation is not very exact, more intuition and whatnot, so let me know if there was anything you did not understand.

Step-by-step explanation:

This is assuming the rectangle has its sides parallel with the x and y axes.

Let's try to eliminate them one by one. A cone does not seem likely since it has slanted sides, and spinning the two straight sides will keep the sides straight. This can be used for the pyramid as well. Let me know if this doesn't make sense though.

Now for me I would imagine that rectangle being a sheet of paper, or metal. if you set that sheet atop some dirt or something and then rotated it, what shape would be drawn into the material? It would be a circle. So we know the 3d shapewill have a base of a circle, which leaves us with a cylinder. Again, let me know if this method did not make sense.

5 0

3 years ago

8.75 is 0.5% of what number

Otrada [13]

Answer:

1750

Step-by-step explanation:

I put it in an image

but multiplyng it would have been the opposite.

and it would be 0.5% of 8.75 is what.

3 0

4 years ago

What is the surface area of the cylinder? Use three and fourteen-hundredths for pi and round to the nearest hundredth. Enter you

nadya68 [22]

Answer:

954.56 cm²

Step-by-step explanation:

Firstly i would calculate the circumference of the circles on top of the cylinders:

Circumference of circles = $\pi d$ or $2\pi r$

d = diameter

r = radius

I will use $2\pi r$

circumference = 2 x 3.14 x 8 = 50.24 cm

⇒ This would help me to find out the surface area of the side of the cylinder

50.24 x 11 = 552.64 cm²

⇒ This is the surface are of the sides

Now we have to find the are of the two circles on the top and the bottom:

Area of a circle = $\pi d^{2}$

d = diameter

3.14 x 8² = 200.96

⇒ There are two circles so you would times 200.96 by 2

200.96 x 2 = 401.92

Add all the values up:

401.92 + 552.64 = 954.56 cm²

I hope this helps!

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2 years ago

For a certain map, the scale shows that 1 cm on the map equals 2.50 km on earth's surface. two towns on the map are 4.75 cm apar

Julli [10]

<span>In this problem, to find the answer we have to setup a series of ratios that relate the scale to real life distance. We know that 1cm = 2.50km, so that ratio would be 1cm/2.5km. For two towns that are 4.75cm apart on the map, we set a ration of 4.75cm/x km, where x is the actual distance. Now we set the ratios equal to each other and solve for x. 1/2.5=4.75/x where x = 4.75*2.5/1 = 11.875 and rounding up we get 11.88 km. The two towns are actually 11.88 km apart from each other.</span>

3 0

3 years ago