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3 years ago

_+349=1250 and 865-=347 HELP

1 answer:

4 0

The answers are 901 and 518.

In order to find out these answers, you first figure out whether you are adding or subtracting. Take the first one for example: ____ + 349 = 1250. You are adding. So what you can do is do the opposite, which is subtract in this instance, and put the numbers in order with the number after the equal sign first. That's how I ended up with 901.

Now with the other problem, its not as simple. We have to subtract 347 from 865.

Hope this helps :)

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While in orbit, a space shuttle travels at a speed of 28,200 kilometers per hour. What is the total number of kilometers travele

kogti [31]

Answer:

The distance is 676,800 kilometers, which in scientific notation has a value of 6.748*10⁵ kilometers.

Step-by-step explanation:

A space shuttle travels at a speed of 28,200 kilometers per hour. Given that in 1 day there are 24 hours, it is possible to apply the following rule of three: if in 1 hour the space shuttle travels 28,200 kilometers, in 24 hours how much distance will the space shuttle travel?

$distance=\frac{24 hours*28,200 kilometers}{1 hour}$

distance= 676,800 kilometers

Scientific notation is a quick way to represent a number using powers of base ten. This notation is used to be able to express very large or very small numbers very easily.

The numbers are written as a product:

a*10ⁿ

where:

a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
n is a whole number, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always a whole number, positive if it is shifted to the left, negative if it is shifted to the right.

To write the number 676,800 in scientific notation, perform the following steps:

The decimal point is moved to the left as many spaces until it reaches the right of the first digit. This number is then written, which will be the coefficient a in the expression of the previous product. In this case a=6.76800= 6.748

The base 10 is written with the exponent equal to the number of spaces that the comma moves. This is a positive number because the comma is shifted to the left. In this case n= 5

Then, <u><em>the distance is 676,800 kilometers, which in scientific notation has a value of 6.748*10⁵ kilometers.</em></u>

5 0

3 years ago

Sarah hopes to be 5 feet tall by her next birthday. Right now, she is 148 centimeters tall. About how many more centimeters does

Alla [95]

Answer:

4.4 cm

Step-by-step explanation:

To solve this problem, we have to remind the conversion factor between feet and cm. We know that:

1 foot = 12 inches

1 inches = 2.54 cm

So,

$1 ft = 12 \cdot 2.54 =30.48 cm$

In this problem, Sarah's height right now is

h = 148 cm

She wants to be 5 feet tall by her next birthday: it means that her height should be

$h'=5 ft \cdot 30.48 =152.4 cm$

Therefore, she needs to grow by:

$h'-h=152.4-148=4.4 cm$

So, she needs to grow 4.4 cm more in order to be 5 feet tall.

3 0

4 years ago

42/40 into a mixed number is??

SSSSS [86.1K]

Hello there!

So, as we see that 42 is more than the denominator, so, we would have to see by how much it would be over.

40-42=2.

So, sense we have an whole number which would be (1)

Your answer: $\boxed{\boxed{\bf 1\frac{2}{40} }}$

6 0

4 years ago

the disk in the hard drive of Stella's computer makes 90 full turns every second. How many minutes will it take for the disk to

noname [10]

First we have to divide 135,000 by 90, which equals 1,500. Then we divide 1,500 (seconds) by 60 (60 seconds in a minute) and get: 25 Minutes.

8 0

4 years ago

Find the distance from point A to the given line:<br> A(-1, 7), y=3x<br><br> How do I solve this?

kipiarov [429]

he formula of a distance between a point (a, b)

and a line Ax + By + C = 0:

$d=\dfrac{|Aa+Bb+C|}{\sqrt{A^2+B^2}}$

We have the point A(-1, 7) → a = -1, b = 7

and the line y = 3x → 3x - y = 0 → A = 3, B = -1, C = 0.

Substitute:

$d=\dfrac{|(3)(-1)+(-1)(7)+0|}{\sqrt{3^2+(-1)^2}}=\dfrac{|-3-7|}{\sqrt{9+1}}=\dfrac{|-10|}{\sqrt{10}}=\dfrac{10\sqrt{10}}{\sqrt{10}\cdot\sqrt{10}}\\\\=\dfrac{10\sqrt{10}}{10}=\sqrt{10}$

<h3>Answer: d = √10</h3>

3 0

3 years ago

_____+349=1250 and 865-____=347 HELP

_+349=1250 and 865-=347 HELP