How many significant digits are in 80,000

Answers

Answer 1
Answer: 2 because the equation can be reduced to: 8.0 x 10^4.
Answer 2
Answer: Actually it's 5 because there is no decimal space and if you only include 8 then that means the number is actually 8.

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Julie's cell phone is 9 centimeters long. How many millimeters long is her cell phone?

Answers

julie's cell phone is 90 millimeters long. 
It is 90 millimeters. ^_^

If you put a $160 coat on layaway and make a 25% deposit, what is the balance owed?

Answers

25% of $160

= (25/100) * 160

= 0.25 * 160

= 40

$40 paid.

Balance owed = $160 - $40 = $120

Balance owed = $120

One side of a regular octagon is 4 inches long. What is the length of another side of the octagon?32 inches
8 inches
4 inches
can't be determined

Answers

The length of the other side is 4 inches and total length is 32 inches , Option C is the answer.

What is a Regular Octagon ?

A regular octagon is a polygon with eight sides and all the sides are equal.

It is given that side of a regular octagon is 4 inches

The length of the other side will also be 4 inches

The total length or the perimeter of the regular octagon is

4*8

= 32 inches

Therefore the length of the other side is 4 inches and total length is 32 inches , Option C is the answer.

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A regular octagaon has 8 equal sides 

so it only makes sense to say that the other side of an octagon would be 4 inches too!

But  if you want to know the total length,  multiply 8 x 4 = 32 inches!  
BUT THIS IS ONLY IF ITS A REGULAR OCTAGON 

otherwise it can't be really determined since I don't know its symmetry or the angles!!


Hope I answered your question! :)

A bag contains 99 red marbles and 99 blue marbles. Taking two marbles out of the bag, you: • put a red marble in the bag if the two marbles you drew are the same color (both red or both
blue), and
• put a blue marble in the bag if the two marbles you drew are different colors.
Repeat this step (reducing the number of marbles in the bag by one each time) until only one
marble is left in the bag. What is the color of that marble?

Answers

The final marble left in the bag will be red.

Let, analyze the process step by step:

Initially, the bag contains 99 red marbles and 99 blue marbles.

When you take two marbles out of the bag, there are two possibilities: either you get two red marbles or two blue marbles, or you get one red and one blue marble.

a. If you get two marbles of the same color (both red or both blue), you put a red marble in the bag.

b. If you get one red and one blue marble, you put a blue marble in the bag.

After putting a marble back in the bag, you have one less marble in the bag.

You repeat this process, reducing the number of marbles in the bag by one each time, until only one marble is left in the bag.

Now, let's think about the outcomes at each step:

If the bag contains an odd number of marbles (99 red + 99 blue = 198), the final marble will be red because at each step, you are adding a red marble back to the bag.

If the bag contains an even number of marbles (e.g., 100 red + 100 blue = 200), the final marble will be blue because at each step, you are adding a blue marble back to the bag.

In this case, the bag contains 99 red marbles and 99 blue marbles, which is an odd number (198 marbles).

Therefore, the final marble left in the bag will be red.

To learn more on probability click:

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Connecting a DVD player to a television set requires a cable with special connectors at both ends. You buy a six-foot cable for $15.50 and a three-foot cable for $10.25. Assuming that the cost of a cable is the sum of the cost of the two connectors and the cost of the cable itself, what is the cost of a four-foot cable?

Answers

so a 3 foot cable is10.25
a 6foot cable is 15.50
so
x=cost per foot
y=cost of special connectors
3x+y=10.25
6x+y=15.50
make first equation negative and add to the first
3x=5.25
divide both sides by 3
1.75=x
so it costs 1.75 for a foot of cable

subtitue into first equation
3(1.75)+y=10.25
5.25+y=10.25
subtract 5.25 from both sides
y=5 dollars=cost of special so
4x+y=4(1.75)+5=7+5=$12

so the cost of a 4 foot cable is $12

when the base of a ladder is placed 10ft away from the base of a building, the top of the ladder touches the building at 18ft above the ground. About how long is ladder?

Answers

35 feet i think i’m not sure