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Diano4ka-milaya [45]
3 years ago
10

Explain how an estimate helps you place the decimal point when multiplying 3.9 × 5.3

Mathematics
2 answers:
natali 33 [55]3 years ago
4 0
An estimate helps you because you round 3.9 to 4 and 5.3 to 5 so then you can give a rough estimation
den301095 [7]3 years ago
4 0

Answer:

3.9\times 5.3\approx 20

Step-by-step explanation:

To find : How an estimate helps you place the decimal point when multiplying 3.9\times 5.3 ?

Solution :

Estimate the number 3.9 by rounding to ones,

As tenth place 9 >5 ones place round by 1.

So, 3.9\approx 4

Estimate the number 5.3 by rounding to ones,

As tenth place 3<5 ones place remain same.

So, 5.3\approx 5

3.9\times 5.3\approx 4\times 5

3.9\times 5.3\approx 20

Therefore, 3.9\times 5.3\approx 20

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Helping others makes a person good ​
oksano4ka [1.4K]

Answer:

9 cm.

Step-by-step explanation:

Let the height of the pyramid be h cm, then the height of the cuboid is (15 - h) cm.

Volume of the pyramid:

= 1/3 * h * s^2      where s is the length of a side of the square base.

= hs^2/3 cm^3

Volume of the cuboid:

= s^2(15 - h).

So we have:

hs^2/ 3 = 300.......................(1)

s^2(15 - h) = 600..................(2)

From  equation (1) :

h s^2 = 900

s^2 = 900/h

Now substitute for s^2 in  equation (2) :

(900/h)(15 - h) = 600

Multiply through by h:

900(15 - h) = 600h

13500 - 900h = 600h

1500h = 13500

h = 9 cm (answer).                  brainliest?

3 0
3 years ago
Tamara owns 595 shares of stock in a home appliance company. The value of the stocks is $12.75 per share. The company offers a 5
emmainna [20.7K]

Answer:

she would get 12.75 per eache 63.75 that the company gets hope this helps

Step-by-step explanation:

7 0
3 years ago
Maria plans to fill pots in her garden with soil and plant food. Maria has 8 1/2 quarts of soil as 1 1/2 quarts of plant food. E
babymother [125]
1. You have the following information:
<span>
 - Maria has 8 1/2 quarts of soil.
 - Each pot requires 3/4 quart of soil.
</span>
 2. Keeping this on mind, you can convert the mixed number 8 1/2 and the fracion 3/4 to decimals, as below: 

 8 1/2=8.5 quarts
 3/4=0.75 quarts

 3. Therefore, you have:

 1 pot-----0.75 quarts
       x-----8.5 quarts

 x=(8.5x1)/0.75
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<span>
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8 0
3 years ago
Help with this question
wlad13 [49]
<h3>A.</h3>

See below for a graph

<h3>B.</h3>

The inverse of a function appears on a graph as the reflection of the function across the line y=x. This is because the inverse relation is effectively the same relation with the variables x and y swapped. Here, the graphs of f(x) and g(x) are mirror images of each other across the line y=x, so we can see they are inverse functions.

The same technology allows us to graph y=f(g(x)) and y=g(f(x)). Both are graphs of y=x, as expected.

7 0
3 years ago
The larger of two numbers is 7 more than 5 times the other. Their sum is 55. Find the two numbers.
viva [34]

Answer:

Step-by-step explanation:

8 and 47

7 0
3 years ago
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